With coins, supplies are limited either because they are very old, were minted in very limited supplies, or contain errors or other distinctive features that set them apart. Errors are common ...

Manufacturing errors might be annoying when it comes ... This took place just as the U.S. Mint was working on a new metal alloy for coins. The alloy had a gold tint that was eventually used ...

This 1984 $1 coin was struck on 10 cent blank error, making it a rare and valuable find. · Source: Roxbury's Auction House/Getty An “exceptionally rare” $1 ...