The product is a 5-pack of circulated Mercury dimes composed of 90% silver, with one coin from each year 1919, 1920, 1940, and an unknown year. These dimes were minted in Denver and are uncertified. The variety is Mercury and the denomination is 10 cents. These dimes would be a great addition to any coin collection, especially for collectors interested in US coins from the early to mid-20th century.i