The 1959 Denver minted dimes, also known as "Mercury dimes," are collectible coins produced by the United States Mint. These coins are composed of 90% silver and 10% copper, and they are highly sought after by collectors due to their silver content and historical significance. A roll of 10c coins refers to a tightly sealed bank roll containing 50 dimes, valued at $5 in face value. The 1959 issue is particularly notable as it falls within the period before the transition to the Roosevelt dime series. Collectors often assess dimes based on condition, mint mark, and market demand.