The 1986 Denver Mint produced dimes, specifically the Roosevelt dime, which is part of the 10-cent denomination in the United States. Collectors often seek out rolls of these coins for their historical value, mint condition, and potential rarity. The Denver mint mark (D) indicates that the coin was struck at the Denver Mint facility. Collectible coins like these can be valued based on their condition, demand, and specific attributes such as mint marks or production errors.