The product is a lot of 10 circulated 10 cent Mercury dimes from the years 1940, 1941, 1942, 1943, and 1945. These dimes were minted in Philadelphia, Pennsylvania, and are composed of 90% silver and 10% copper. They are part of the Mercury series of coins issued by the United States government. This collection would be a valuable addition to any coin enthusiast's collection, showcasing the history and craftsmanship of American coinage during the mid-20th century.