The 1940 San Francisco Mercury Dime, identified by its "S" mintmark, is a highly sought-after collectible coin in the United States. Struck by the U.S. Mint, it features the iconic design by Adolph A. Weinman, depicting a stylized Liberty with wings. Mercury Dimes, minted between 1916 and 1945, are composed of 90% silver and have a face value of 10 cents. The 1940 issue is not especially rare, but its condition, grading, and market demand can greatly influence its collectible value.

Item Denomination Series Year Mint
1940-S 10c 10c Mercury Dimes 1940 San Francisco