Collectible coins, particularly those from the United States, encompass a wide range of denominations, including the 1 cent (1c) and 50 cent (50c) coins. Proof sets, which include coins struck with a higher quality finish, were first produced by the U.S. Mint in 1936 and became popular among collectors. The 1939 Proof Set is notable for containing coins such as the Lincoln penny, the Jefferson nickel, the Washington quarter, and the Franklin half dollar, all of which are highly sought after by numismatists for their quality and historical significance.

Item Denomination Series Year Mint
1939 1c-50c Proof Set 1c-50c Proof Sets 1939 Philadelphia