Rich Off Error Coins
Learn, spot, and validate valuable error coins and varieties. Straightforward guides, clear photos, and AI-powered identification to help collectors move confidently.
Spot real value
Step-by-step visuals to tell genuine mint errors and varieties from damage. No jargon, just what to look for.
AI-backed identification
Upload clear photos to get AI-assisted hints on likely errors, rarity, and next verification steps.
Collector-ready checklists
Printable lists for top U.S. denominations and dates so you can sort, grade, and price faster.
Latest insights
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1955 Doubled Die Lincoln Cent: What to Look For
The 1955 doubled die Lincoln cent is the best-known U.S. doubled die. Strong Class I hub doubling happened when the working die received misaligned impressions, creating bold, spread-out letters that you can see without magnification. Graded examples in mid-grade circulated condition can still sell for hundreds, while high-grade pieces reach the thousands. If you find
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