Snap any coin. Know its story in seconds.
Take a photo — MintMark reads the denomination, year, and mint mark, then shows you the valuable errors and varieties to check for. With pictures.
From “what is this?” to “whoa!” in under a minute
1 · Snap your coin
Take a photo. MintMark reads the design, the date, and the mint mark automatically — no typing needed.
2 · Get the full story
Series, mint, designer, composition — and instant alerts when your coin contains real silver or is a key date.
3 · Hunt for treasure
See every documented error and variety for your exact coin — what it looks like, how to check, and what it's worth.
Mistakes worth money
The U.S. Mint strikes billions of coins a year — and sometimes things go wrong. Those mistakes are what collectors hunt for.
Doubled Die (Obverse)
The front design shows a second, shifted image because the die itself was made doubled.
Learn to spot it →
Off-Center Strike
The blank wasn't centered when struck, so part of the design is missing and part of the coin is blank.
Learn to spot it →
Clipped Planchet
A bite-shaped piece of the coin is missing because the blank was punched from an already-punched part of the metal strip.
Learn to spot it →
Die Cud
A piece of the die broke off at the rim, leaving a raised featureless blob attached to the coin's edge.
Learn to spot it →Grab any coin and let’s find out what it is
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