Collectible coins, particularly in the context of the United States, include a range of denominations and designs. The 10 cent coin, known as the dime, has featured various designs over the years. The Mercury Dime, produced from 1916 to 1945, is notable for its depiction of Lady Liberty wearing a winged cap. The 1940 Mercury Dime minted in San Francisco (S mint mark) is particularly sought after by collectors, as its rarity and condition can significantly influence its market value. Collecting these coins involves studying mint marks, design variations, and historical context.

Item Denomination Series Year Mint
1940-S (San Francisco) Mercury Dimes 10¢ (Ten Cents, Dime) Mercury Dimes 1940 San Francisco