In numismatics, collectible coins often refer to coins that are sought after by collectors and investors due to their historical significance, rarity, condition, or specific features. In the context of the United States, the half dollar coins, particularly those minted after the establishment of the U.S. Mint, have been popular among collectors. A specific example is the 1939 half dollar, minted in Philadelphia, which is notable for its designs and sometimes lower mintage numbers. Collectors may seek complete rolls of these coins for their collection, particularly focusing on variations and mint marks.

Item Denomination Series Year Mint
1939 50c Roll 20 Coins 50c Roll Half Dollars 1939 Philadelphia