Famous and Key-Date Coins
Research famous U.S. coins, key dates, legendary rarities, and the diagnostics behind them.
1909-S VDB Lincoln Cent
Key-date status, mintmark and designer-initial diagnostics, altered examples, and certification.
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1914-D Lincoln Cent
Key-date diagnostics, mintmark alteration risk, wear patterns, and certified comparisons.
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1922 No D Lincoln Cent
Die-pair diagnostics, weak-D examples, filled dies, and why certification matters.
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1931-S Lincoln Cent
Low mintage context, circulated availability, color, and complete-date sets.
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1955 Doubled Die Cent
A famous die variety with strong lettering diagnostics; direct error education to ErrorCoins.co.
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1913 Liberty Head Nickel
Extreme rarity, known population, provenance, replicas, and authentication.
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1916-D Mercury Dime
Mintmark placement, altered examples, grade sensitivity, and certification.
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1942/1 Mercury Dime
Overdate diagnostics, die markers, wear, and certified attribution.
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1894-S Barber Dime
Legendary rarity, known examples, provenance, and replica awareness.
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1916 Standing Liberty Quarter
Low-mintage first-year issue, date diagnostics, wear, and certification.
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1932-D Washington Quarter
Key-date mintmark, altered coins, strike, and circulated grade comparisons.
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1932-S Washington Quarter
Key-date mintmark, natural surfaces, and exact grade comparisons.
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1893-S Morgan Dollar
Key-date Morgan, diagnostics, altered mintmarks, counterfeit risk, and certification.
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1895 Morgan Dollar
Proof-only Philadelphia issue, auction provenance, and deceptive claims.
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1903-O Morgan Dollar
Treasury-release history, grade distribution, bag marks, and market context.
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1921 High-Relief Peace Dollar
Relief, strike weakness, luster, surfaces, and certified grading.
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1934-S Peace Dollar
Condition rarity, strike, luster, wear, and grade sensitivity.
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1877 Indian Head Cent
Key-date status, diagnostics, altered dates, and certification.
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1878-CC Trade Dollar
Carson City scarcity, counterfeit risk, chop marks, and expert authentication.
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1870-S Seated Liberty Dollar
Extreme rarity, known examples, provenance, and fabricated pieces.
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1793 Chain Cent
First federal cent design, varieties, porous surfaces, and expert attribution.
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1794 Flowing Hair Dollar
Historic significance, die markers, known examples, provenance, and museum context.
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1804 Dollar
Class I, II, and III context, famous restrikes, known specimens, and replica warnings.
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1933 Double Eagle
Legal history, known specimens, ownership restrictions, and why ordinary listings are suspect.
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1915-S Panama-Pacific $50
Round and octagonal commemorative gold, provenance, and certification.
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