The 1990 penny error coins represent some of the most exciting finds for modern coin collectors. This year marked a significant transition in U.S. Mint production ...
Minting coins isn't exactly an exact science. Even though most coins are perfect and uniform, small mistakes can result in error coins that are super valuable and ...
Some of the rarest and most valuable coins in U.S. history owe their worth to minting errors that slipped through unnoticed. Coins like the 1943 Copper Penny, struck in copper instead of wartime steel ...
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6 coin errors collectors pay a premium for
2. The Missing Mint Mark Next on our list is the missing mint mark. Most coins have a little letter indicating where they were produced-like a secret handshake between coin enthusiasts. If a coin ...
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