Mercury Dime - Rare Coins and Errors to Watch For Keydates- 1916-D with a mintage of only 264,000 Beware of 1916 dimes that have had the "D" mintmark added by unscrupulous sellers looking to make a quick buck. Semi-key dates- 1921, 1921-D, 1926-S, 1931-S, 1931-S ...
Bank, David