Collectible coins are items of numismatic interest that can include various types, such as historical currency, commemorative pieces, and bullion coins. In the United States, dimes are ten-cent coins that have been minted since 1796. The 1934 Denver mint mark indicates that the coin was produced at the Denver Mint, which is known for striking coins with a distinct "D" mark. Rolls of dimes, such as a 10c roll, can contain multiple coins from this era, appealing to collectors seeking to complete their sets or invest in specific years and mints.