Question: What unique mark identifies coins produced at the Denver Mint?

Answer: Coins from the Denver Mint bear a small letter “D,” known as the mint mark, on one side. This mark has been used to identify the Denver Mint’s coins since it began operating in 1906. Some gold coins minted from 1838-1861, however, have the same “D”—once an identifier of the short-lived Dahlonega Mint in Georgia.