Collectible coins often include various types such as circulating coins, commemorative coins, and proofs. The United States Mint produces these coins, including denominations like 1 cent (1c) and 50 cents (50c). Proof sets, which feature coins struck with higher standards of quality and finish, are particularly sought after by collectors. The 1961 Proof Set, minted in Philadelphia, includes a complete set of coins from that year, showcasing their unique characteristics and limited availability.

Item Denomination Series Year Mint
1961 1c-50c Proof Set 1c-50c Proof Sets 1961 Philadelphia