Presidential Dollar Errors & Varieties Guide (2007–2020)

The Presidential Dollar series (2007–2020) introduced a production technology not seen on circulating U.S. coinage in over seven decades: edge lettering. Required by the Presidential $1 Coin Act of 2005, the inscriptions — date, mint mark, E PLURIBUS UNUM, and (through 2008) IN GOD WE TRUST — were applied in a separate post-strike step using high-speed Schuler Edge Lettering Machines. This mechanical decoupling of striking and edge lettering is the defining source of the series' most significant and collectible errors.

This guide catalogs every recognized error and variety across the Presidential Dollar series: fourteen distinct error types ranging from the widespread 2007-P Washington “Godless Dollar” Missing Edge Lettering to the ultra-rare 2014-D Sacagawea/Presidential Mule that realized over $84,000 at Heritage Auctions. Composition was consistent throughout the entire series: manganese-brass clad (77% Cu, 12% Zn, 7% Mn, 4% Ni outer layers; pure copper core), 8.10 grams, 26.49 mm diameter. For standard Presidential Dollar values by president and year, see our complete Presidential Dollar value guide.

Presidential Dollar Error Values & Price Guide

Every recognized Presidential Dollar error and variety in one reference table, organized by tier. Error name links jump to the full diagnostic section below. No year-specific Presidential Dollar error subpages are currently available in this catalog.

Values represent typical market prices based on realized auction prices at Heritage Auctions, GreatCollections, and PCGS Auction Archives as documented in the series source data. Actual prices depend on individual coin quality, grade, eye appeal, and current market conditions. For standard (non-error) Presidential Dollar values by president and year, see our complete Presidential Dollar value guide.

How to Identify Presidential Dollar Errors

The Presidential Dollar's two-step minting process — separate strike and edge lettering — creates distinct error types requiring a specific inspection sequence. Follow these steps in order before drawing any conclusions about your coin.

Required Tools

• Digital scale (accurate to 0.01g): The single most important tool in this series. Authentication of Missing Edge Lettering errors and Missing Clad Layer errors depends entirely on weight measurement.
• Digital calipers: Measure diameter on any smooth-edge coin to confirm no metal was removed (standard: 26.49 mm; under 26.40 mm = filed fake).
• 10× loupe with strong directional light: Essential for edge surface inspection — distinguishing genuine MEL from filed fakes, reading DEL text, and detecting the Blakesley Effect on clipped planchets.

Smooth MEL edge (top) vs. normal lettered Presidential Dollar edge (bottom): the genuine MEL surface is even and burnished from the blanking and upsetting process — no tool marks, no striations, no partial letter impressions.

Step-by-Step Inspection Workflow

1. Examine the edge first. Is it completely smooth (MEL candidate)? Doubled or garbled (DEL)? Present but ghost-like (Weak Edge)? This single observation determines which error type you are investigating.
2. If smooth — weigh the coin immediately. A genuine Missing Edge Lettering error must weigh 8.10g (±0.3g). The acceptable range is 7.8–8.4g. A coin under 7.8g has almost certainly had its edge filed or ground down. This is the #1 authentication test for the entire series.
3. Measure the diameter on any smooth-edge coin. Standard is 26.49 mm. A caliper reading below 26.40 mm on a smooth-edge coin is strong evidence of alteration.
4. Inspect the edge surface under 10× magnification with angled light. A genuine MEL has a smooth, burnished surface from the blanking and upsetting mill — even texture, no linear marks. Filed fakes show parallel striations, scratch marks, or matte grinding residue.
5. If edge lettering appears doubled or garbled, read the entire inscription slowly while rotating the coin. Confirm two full, complete sets of text — not a single set that is simply misaligned or uneven.
6. Check face color contrast. If one entire face is deep copper-red, weigh immediately — a genuine missing clad layer typically produces a weight of 5.5–6.5g (15–20% below standard).
7. Examine both faces under magnification for smooth featureless patches (struck through grease), doubling on lettering or portrait details (DDO/DDR), and raised irregular metal lines (die cracks).

Composition & Weight Reference by Era

All four eras share identical manganese-brass clad composition and 26.49 mm diameter. For an overview of the edge lettering collection discipline, see the NGC guide to collecting Missing Edge Lettering Presidential Dollars.

Presidential Dollar Missing Edge Lettering (MEL) Errors

Missing Edge Lettering errors occur when a struck coin bypasses the Schuler Edge Lettering Machine entirely — exiting the production line with a completely smooth edge. These are the most numerous and accessible major errors in the Presidential Dollar series. The 2007-P George Washington MEL is the highest-population example, with PCGS reporting over 6,000 certified examples in MS64 alone. Authentication is the primary challenge: the majority of smooth-edge Presidential Dollars encountered by collectors are altered coins with filed or ground edges, not genuine MEL errors.

2007-P Washington “Godless Dollar” MEL: the smooth, burnished edge (highlighted) shows the even surface characteristic of the blanking and upsetting process — no lettering, no striations, no file marks. The obverse portrait is fully and normally struck.

2007-P George Washington Missing Edge Lettering (“Godless Dollar”)

When the Presidential Dollar program launched in January 2007, some Washington dollars exited the Philadelphia Mint without passing through the Schuler Edge Lettering Machine. Because IN GOD WE TRUST appeared on the edge in 2007 (it moved to the obverse in 2009), these smooth-edge coins appeared to omit the national motto entirely — generating immediate national media attention and the nickname “Godless Dollar.” That publicity drove strong collector demand and established this error as the series' foundational variety. For historical background, see the NGC George Washington error coin overview.

Pickup Points

1. Edge: Completely smooth — no date, no mint mark, no mottos. Any faint impression present disqualifies a true MEL.
2. Weight: 8.10g (±0.3g) — the definitive test. Acceptable range: 7.8–8.4g.
3. Diameter: ~26.49 mm. Calipers below 26.40 mm confirm filing.
4. Edge surface under magnification: Even, burnished texture from the blanking process — no linear tool marks.

Values

• MS64:$28–$46
• MS65: ~$46 (PCGS Auction Archives — 2007-P Washington MEL | population data: PCGS CoinFacts)

2007-P John Adams Missing Edge Lettering — Satin Finish (SP)

The rarest MEL variant in the series: a 2007 John Adams dollar struck in Satin finish — produced for the Uncirculated Mint Set — that bypassed the edge lettering machine. The Satin finish is a distinctive matte, even, non-reflective surface entirely different from standard business strike luster (which shows cartwheel luster) and from Proof surfaces (which are mirror-like). PCGS and NGC grade these coins as SP (Specimen), not MS, reflecting their origin in the Mint Set production run.

Pickup Points

1. Surface finish: Matte, subdued, non-reflective on both faces. If the coin has standard cartwheel luster, it is a business-strike MEL, not a Satin MEL.
2. Origin: Must originate from a 2007 Uncirculated Mint Set. Satin finish was applied specifically to Mint Set coins from 2005–2010.
3. Edge: Completely smooth, with the same burnished texture as all genuine MEL errors.
4. Grade designation: Certified SP (Specimen) — this slab designation confirms authenticity for buyers.

Values

• SP66:$129 (GreatCollections auction record — Adams MEL Satin SP66)

Presidential Dollar Double Edge Lettering (DEL) Errors

Double Edge Lettering (DEL) errors occur when a coin passes through the Schuler Edge Lettering Machine twice — failing to eject after the first pass or recirculating through the feed mechanism. Two separate sets of inscriptions are impressed into the edge, producing garbled, crowded, or overlapping text around the entire rim. The 2007 issue year is the primary source of DEL errors, with John Adams dollars producing the most recognized and well-documented varieties. Estimated populations of 8,000–12,000 Adams DEL examples across both sub-types make this collectible but accessible. For a detailed technical explanation of the edge impression mechanism, see the Presidential Dollar Edges reference guide.

2007-P Adams Double Edge Lettering (Inverted): one inscription set reads right-side up (white labels) while the second set runs in the opposite direction (yellow labels) — the coin flipped between its first and second machine pass.

2007-P John Adams Double Edge Lettering (Overlapped)

The Overlapped DEL occurs when the coin enters the machine for a second pass in the same orientation as the first. Letters from both passes overlap directly on one another or are slightly offset, creating a crowded, garbled appearance. Sections of the inscription may appear thickened, doubled, or partially illegible where the two sets of characters misalign.

Pickup Points

1. Two complete sets — same direction: Both sets of text read in the same direction when rotating the coin. The inscription appears crowded, thickened, and garbled where characters from both passes overlap.
2. Full circumference: The doubling effect should be visible around the entire edge, not just one section.

Values

• MS65:$62 (PCGS Auction Archives — 2007-P Adams DEL Overlapped MS65)

2007-P John Adams Double Edge Lettering (Inverted)

The Inverted DEL is the more visually dramatic and more valuable variant. Between the first and second machine pass, the coin physically flipped over. One set of inscriptions reads right-side up relative to the obverse portrait; the second set reads upside down relative to the obverse. Looking around the edge, you can observe text running in two opposite directions simultaneously — an unmistakable visual signature. Full NGC population data and pricing: NGC Coin Explorer — 2007-P Adams DEL Inverted.

Pickup Points

1. Opposite-direction text: One complete inscription set reads normally; the second complete set reads upside down relative to the obverse. Both sets are present around the full edge.
2. Not single inverted lettering: A single upside-down set (with no second set) is normal production variation on 50% of all coins — it has zero premium. Confirm you can trace two full separate texts.
3. Higher value than Overlapped: The visual drama and relative scarcity of the Inverted sub-type command a meaningful premium over the Overlapped variety.

Values

• MS65–MS66:$60–$179
• MS66 auction record:$179 (PCGS/Heritage)

2007-P Thomas Jefferson Double Edge Lettering

The Thomas Jefferson dollar produced Double Edge Lettering errors in 2007 through the same Schuler machine failure mechanism as the Adams issues. Both Overlapped and Inverted sub-types may exist for the Jefferson dollar. Diagnostics are identical to the Adams DEL: two complete, garbled sets of inscriptions around the full edge circumference. For broader Presidential Dollar auction price history across all presidents, see PCGS Presidential Dollar Auction Prices.

Pickup Points

1. Two complete inscription sets: Garbled, crowded text around the full edge, with characters from two separate machine passes overlapping or running in opposite directions.
2. Sub-type determination: Identify whether both sets read the same direction (Overlapped) or opposite directions (Inverted) to establish the specific variety.

Values

• MS65:$111 (PCGS/Heritage auction record)

Presidential Dollar Weak Edge Lettering Varieties

Weak Edge Lettering errors result from insufficient pressure during the edge lettering process — the Schuler machine may be set incorrectly, or the coin may be slightly undersized (but within tolerance), preventing the die from biting deeply into the planchet rim. The lettering is visible but extremely faint, lacking the sharp, incused definition of a standard strike. The critical diagnostic rule: genuine Weak Edge Lettering errors must show Mint State surface detail on the obverse and reverse, contrasting sharply with the ghost-like edge. A coin where both the faces and the edge are worn has simply circulated — it is not a mint error.

2010-P Fillmore Weak Edge Lettering: the obverse portrait displays sharp Mint State detail and full luster while the edge inscription (inset) is ghost-like and barely impressed — the key diagnostic contrast that confirms a mint production error rather than circulation wear.

2010-P Millard Fillmore Weak Edge Lettering

The 2010 Millard Fillmore dollar is the single most recognized Weak Edge Lettering variety in the Presidential Dollar series. The inscription is present but ghost-like — likely the result of low pressure settings or collar misalignment on the Schuler machine during this specific production run. The variety's existence is confirmed by certified auction records. For a documented sale example, see GreatCollections — 2010-P Fillmore Weak Edge Lettering PCGS MS65.

Pickup Points

1. Edge: Lettering is present and legible under magnification, but extremely faint — ghost-like impressions without the sharp, incused definition of a normal strike.
2. The contrast rule (critical): Obverse and reverse faces must show full Mint State detail: sharp devices, full luster, and no wear. The faintness must be isolated exclusively to the edge lettering.
3. Rule out circulation wear: If the coin faces show any wear (Good, Fine, or VF grade), the weak edge is simply from circulation — not a mint production error. This distinction is essential before attributing or pricing the coin.

Values

• MS65:$35–$89
• MS67:$89 (PCGS certified auction record)

The 2014-D Sacagawea/Presidential Mule — Trophy Rarity

The 2014-D Mule stands apart from every other Presidential Dollar error. It is not a Schuler machine failure — it is a die-pairing error of the highest magnitude. The obverse die of the Sacagawea (Native American) dollar series was accidentally paired with the reverse die of the Presidential dollar series, producing a coin that combines two distinct series designs onto a single planchet. The Sacagawea series and the Presidential series share identical planchet specifications, making this error visually unmistakable but physically indistinguishable from normal coins by weight or diameter alone.

The sale that defined this error's place in numismatic history: a 2014-D Mule realizing over $84,000 at Heritage Auctions, as reported by Coin World. This figure places the 2014-D Mule in a completely separate tier from all other Presidential Dollar errors — it is an investment-grade rarity, not a roll-hunting find.

2014-D Mule: the Sacagawea obverse (left — Native American woman carrying an infant) is paired with the Presidential Dollar Statue of Liberty reverse (right). This impossible die combination is the definitive diagnostic. Note that weight and diameter are normal since both series share identical planchet specifications.

Pickup Points

1. Obverse: Must display the Sacagawea design — a Native American woman carrying an infant on her back. Any President's portrait disqualifies the coin as a Mule.
2. Reverse: Must display the Statue of Liberty (the Presidential Dollar reverse). The flying eagle (Sacagawea reverse) or any Native American reverse design disqualifies the coin as a Mule.
3. Weight and diameter: Normal — 8.10g (±0.3g) and 26.49 mm. Both series use identical planchets, so physical measurements cannot confirm or deny the Mule. Visual die-pairing inspection is the only diagnostic.

Values

• Realized price:$84,000+ (Heritage Auctions — documented by Coin World)

Presidential Dollar Errors You Can Still Find

Beyond the headline trophy errors, the Presidential Dollar series offers a range of accessible planchet and striking errors that can be found in bank rolls, mint bags, and dealer stock. These error types are not unique to the Presidential series, but they are actively collected within it — with documented auction records from as recently as 2016 Nixon dollars confirming ongoing market demand. Production for circulation continued through 2011 (with collector-only NIFC issues from 2012–2016 and a final 2020 issue), so these errors span the full date range of the series.

Struck Through Grease Errors

Grease or other foreign material occasionally accumulates in a die's recesses, blocking metal flow into that portion of the design during striking. The result is a smooth, featureless patch where design elements should appear — the presidential portrait, date, legends, or mottos may be partially or fully obliterated.

Pickup Points

1. Smooth patch: A flat, featureless area on the coin's surface where details should be present. The surrounding design struck normally — only the die-grease-filled area is affected.
2. Value threshold: Premiums only develop when a significant design portion is obliterated. Obliteration of the portrait face, the date, or an entire motto brings the strongest premiums. Minor grease strikes affecting only peripheral design elements carry minimal added value.

Values

• Minor:$5–$15
• Severe (major design loss): Up to $40

Clipped Planchet Errors

Presidential Dollar clipped planchet: the crescent-shaped void (right edge of coin) paired with the Blakesley Effect rim weakness directly opposite at 180° — the definitive authentication diagnostic for genuine planchet clips versus post-mint damage.

Clipped planchets result when the blanking press punches a new planchet from a metal strip that overlaps a previously punched hole. The outcome is a coin with a crescent-shaped section missing from its edge, with the corresponding design cut off at the clip site.

Pickup Points

1. Crescent shape: The void has a smooth, curved cut matching the curvature of a Presidential Dollar planchet — not a jagged break or irregular chip.
2. Blakesley Effect — the authentication key: Examine the rim directly opposite the clip (180° away). Genuine clips show subtle rim weakness or flattening at this point, caused by unequal pressure during the upsetting process when metal was absent at the clip site. This effect is the primary differentiator between a genuine blanking error and post-mint damage.
3. Not post-mint damage (PMD): Coins hit, bent, or broken after leaving the Mint will NOT display the Blakesley Effect. Jagged, irregular, or straight-edged voids indicate damage, not a blanking error.

Values

• All years:$40–$100
• Example: 2016 Nixon Dollar Clipped Planchet, certified MS64 — approximately $40 (Collectors Alliance price reference)

Type 2 Blank Planchet Errors

A Type 2 blank planchet is a Presidential Dollar planchet that passed through the upsetting mill — acquiring its raised rim — but never entered the coining press. Both faces are completely blank; there is no obverse or reverse design, and there is no edge lettering. The raised rim distinguishes a Type 2 blank from a Type 1 blank (a flat disc that predates the upsetting mill step).

Pickup Points

1. Raised rim present: Confirms the planchet completed the upsetting mill step before escaping the production line.
2. Zero design impressions: Under 10× magnification, absolutely no design elements on either face. Heavily worn coins may show near-blank surfaces, but faint design traces always remain — a true blank has none.
3. Weight: Should approximate 8.1g.

Values

• All years:$40–$60

Missing Clad Layer Errors

Missing Clad Layer: one face shows deep copper-red (exposed pure copper core, left) while the other retains normal gold/brass manganese-brass color (right). Weight will measure approximately 5.5–6.5g — 15–20% below the standard 8.10g. Always weigh before concluding.

Presidential Dollars have manganese-brass outer layers bonded to a pure copper core. If the outer layer fails to bond on one side before the coin is struck, that face is struck directly on the copper core, producing a coin that is deep copper-red on one side and normal gold/brass on the other. Design detail on the copper side is typically weak because the thinner planchet generates reduced die pressure during striking.

Pickup Points

1. Color contrast: One entire face is deep copper-red (not dark brown, not patinated brass — specifically the bright red-orange of pure copper). The other face retains normal gold-brass manganese-brass coloration.
2. Weight — the definitive test: A genuine missing clad layer reduces coin weight by approximately 15–20%, to the 5.5–6.5g range. ALWAYS weigh a suspected missing clad error before drawing any conclusion.
3. Environmental damage trap: Coins recovered from burial, water, or metal-detecting finds often develop dark red-brown corrosion that closely mimics a missing clad layer. These coins retain their full 8.1g weight. Weight measurement resolves the ambiguity definitively — a corroded normal coin weighs 8.1g; a genuine missing clad layer does not.

Values

• Confirmed missing clad layer:$50–$200+ depending on grade and severity

Doubled Die Varieties (DDO/DDR) — and Machine Doubling Trap

Machine Doubling (left) vs. True Hub Doubling/DDO (right): MD shows flat, shelf-like displacement that thins letters and has zero numismatic value. True DDO shows rounded, raised secondary images with clear separation that add to device width — extremely rare on Presidential Dollars.

True Doubled Dies are extremely rare in the Presidential Dollar series. Modern single-squeeze hubbing technology has largely eliminated the dramatic doubled dies seen in earlier eras. The vast majority of “doubling” reported on Presidential Dollars is Machine Doubling (MD) — a die-retraction artifact with zero numismatic value.

Cataloged Varieties

• 2007-P John Adams DDO (FS-101): Shows minor doubling on the ear and hair of President Adams. Listed in the Cherrypickers' Guide as FS-101.
• 2010 Millard Fillmore DDO: Known DDO varieties exist but are described as minor in character.

Both known DDO varieties carry only minor collector premiums. For additional variety reference, see Presidential Dollar Varieties at SmallDollars.com.

2020 George H.W. Bush — Final Issue

The 2020 George H.W. Bush dollar is the final coin of the Presidential Dollar series. Error populations for this issue are largely unknown. All standard error types — MEL, DEL, Weak Edge Lettering, clipped planchet, struck through grease — are theoretically possible, but market data specific to 2020 Bush errors is not yet established. If you believe you have a genuine error on a 2020 Bush dollar, apply the full authentication protocol (weight, diameter, edge inspection) and consider professional authentication before any sale.

Values

• Estimated range (limited market data): Face value to $20+ depending on error type and severity

Grading Presidential Dollar Error Coins

Grading Presidential Dollar error coins requires understanding how each error type interacts with standard Mint State grading criteria.

Edge Lettering Errors (MEL, DEL, Weak Edge)

For MEL and DEL errors, the obverse and reverse faces are graded using standard MS criteria — luster, contact marks, strike, and eye appeal. The edge anomaly itself is what identifies the error; it does not lower the face grade. A coin with a smooth MEL edge and MS67 obverse grades MS67. For the Fillmore Weak Edge, the weak edge lettering is the error — graders evaluate the faces at full MS standards and note the edge variety in the attribution.

Planchet Errors (Clips, Missing Clad, Blank)

Clipped planchets and missing clad layers are structural errors assessed with the surviving design surfaces graded normally. Weak striking on the copper face of a missing clad coin (common due to reduced planchet thickness) may lower the strike component of the grade. Blank planchets have no surfaces to grade in the traditional sense — they are assessed by the quality of the rim and the absence of any design.

When Professional Grading (PCGS/NGC) Is Worth the Cost

• 2014-D Mule: Mandatory — no exceptions. No raw coin of this rarity should ever be transacted without TPG certification.
• Any MEL or DEL error: Professional authentication eliminates the primary fraud risk (filed-edge fakes) and provides the graded slab that maximizes resale value. Recommended for any coin you believe is worth $50 or more.
• Missing Clad Layer: Weight testing is necessary but not sufficient for marketplace confidence; TPG slabbing provides definitive confirmation.
• Die varieties (FS-101 Adams DDO): PCGS and NGC will attribute recognized FS-number varieties in the slab designation. This is worth pursuing if the variety is confirmed by diagnostic inspection.
• Minor die cracks: Generally not economical for TPG submission unless on a scarcer NIFC date.

Presidential Dollar Error Authentication

The Presidential Dollar series has a well-documented problem with fraudulent coins — particularly filed edges masquerading as Missing Edge Lettering errors. The following protocol covers the series' primary authentication scenarios.

The Weight Protocol (Primary Test for MEL and Missing Clad)

A digital scale accurate to 0.01 grams is the non-negotiable first step for two error types:

• Smooth-edge coins (suspected MEL): Must weigh 8.10g (±0.3g). The acceptable range is 7.8–8.4g. Under 7.8g = almost certainly altered. Under 7.5g = definitively altered. Metal removal from filing always produces weight loss — there are no exceptions to this physical reality.
• Discolored-face coins (suspected Missing Clad): A genuine missing clad layer reduces weight to approximately 5.5–6.5g (15–20% below standard). A coin with unusual coloring but a normal 8.1g weight has environmental damage — not a mint error.

The Diameter Check (Secondary MEL Test)

Using digital calipers: standard Presidential Dollar diameter is 26.49 mm. Any smooth-edge coin measuring below 26.40 mm has had material removed from the edge — it is an altered coin, regardless of weight.

Edge Surface Inspection (Confirming MEL Authenticity)

Under 10× magnification with strong directional light angled across the rim surface:

• Genuine MEL: Smooth, burnished surface with even, consistent texture — characteristic of the blanking and upsetting process. No linear marks of any kind.
• Filed or ground fake: Parallel striations, scratch marks, uneven polishing, or matte grinding residue. Any linear marks are a disqualifying diagnostic. For photographic reference of genuine versus altered edges, see NGC's guide to altered Washington Dollar edges.

Mandatory Authentication Cases

• 2014-D Mule: PCGS or NGC certification is required before any sale or purchase — no exceptions.
• Any error coin estimated above $50–$100: Third-party grading by PCGS or NGC eliminates authentication risk and consistently yields stronger realized prices in the error coin market.
• Missing Clad Layer errors: Perform the weight test first; submit to a TPG for definitive marketplace authentication.

Where to Sell Presidential Dollar Errors

For certified (PCGS/NGC slabbed) Presidential Dollar error coins, the primary auction venues with documented price histories in this series are Heritage Auctions, GreatCollections, and Stack's Bowers. Raw (uncertified) errors should be submitted to a TPG before sale — certified coins consistently command stronger prices, particularly for MEL errors where buyers require authentication proof. Recent error auction records are searchable in the GreatCollections Error Coin Auction Archive.

Presidential Dollar Error FAQs

Methodology & Sources

All values, diagnostics, auction records, population estimates, weight specifications, and technical claims in this guide are drawn exclusively from the source documents and calculator configuration provided for this series. No prices, rarity claims, or diagnostic points have been invented or extrapolated beyond the provided data.

Primary Sources

• NGC — Collecting Missing Edge Lettering Presidential Dollars (error mechanics, population context, authentication framework)
• NGC — Altered Washington Dollar Surface guide (filed-edge authentication photography)
• NGC — George Washington error coin overview
• PCGS Auction Archives — 2007-P Washington MEL realized prices
• PCGS CoinFacts — 2007-P Washington MEL population data
• PCGS Auction Archives — 2007-P Adams DEL Overlapped MS65 realized price ($62)
• NGC Coin Explorer — 2007-P Adams DEL Inverted variety data
• GreatCollections — 2007-P Adams MEL Satin SP66 auction record ($129)
• GreatCollections — 2010-P Fillmore Weak Edge Lettering PCGS MS65 auction record
• Coin World — 2014-D Mule Heritage Auctions sale ($84,000+)
• PCGS — Edge lettering orientation policy statement
• Collectors Alliance — 2016 Nixon Dollar Clipped Planchet price reference
• SmallDollars.com — Presidential Dollar edge error reference
• SmallDollars.com — Presidential Dollar varieties (Elongated Ray, DDO)
• PCGS — Presidential Dollar series auction price archive

yearRange.end determination: The source document explicitly states 2020 (George H.W. Bush) as the final Presidential Dollar issue. Year 2020 is used as the series end date per the “explicitly stated end year” rule.

Missing Clad Layer value: The source document lists this value as “TODO.” The range of $50–$200+ is sourced from the series calculator configuration (override OV_WRONG_COLOR_VERY_LIGHT value_range field), which is an authoritative provided input.

Internal subpage links: No year-specific Presidential Dollar error subpages (e.g., 2007-dollar-errors, 2014-dollar-errors) appear in the provided subpage inventory. No year-error subpage links have been generated.