Collectible coins encompass a wide range of numismatic items, including those issued by the United States of America. The "10c Roll" refers to a roll of dimes, specifically the coin denomination of ten cents. Dimes have been minted in various designs and years, with the 1975 dimes produced at the Denver Mint being notable for their contemporary production and lower mintages compared to earlier coins. Collectors often seek specific years and mint marks, such as the "D" for Denver, to enhance their collections and potentially find rarer specimens.