Collectible coins, particularly from the United States, include various denominations such as the 1 cent (1c) and 50 cent (50c) coins. Mint sets, which are collections of coins struck in a particular year, often include uncirculated versions from various mints, such as Philadelphia. The 1999 Mint Set is particularly notable due to the release of the state quarter program, which celebrates the states and their respective designs. Collectors seek these items for their historical significance, rarity, and condition.

Item Denomination Series Year Mint
1999 1c- 50c Mint Set 1c- 50c Mint Sets 1999 Philadelphia