Collectible coins, particularly U.S. dimes, can have significant value based on their condition, rarity, and historical context. The 1997 Denver mint marked dimes are part of the Roosevelt dime series, which was first issued in 1946 to honor President Franklin D. Roosevelt. A 10c roll from this year would typically contain 50 coins, and while most 1997 dimes are common, specific conditions or errors may enhance their collectibility and market value. Collectors often seek out coins in uncirculated condition or with unique characteristics.