Collectible coins, including those from the United States, encompass various types such as circulating coins, commemorative coins, and bullion coins. Specific denominations like the 1 cent (penny) and 50 cent (half dollar) coins have produced numerous collectible editions, particularly in special formats like Proof Sets, which feature coins struck with higher precision and finished to a mirror-like quality. The year 1938 is notable in U.S. numismatics for the introduction of the Jefferson nickel, among other significant coinage, making it a point of interest for collectors. Proof Sets from that era can be highly sought after, reflecting the craftsmanship and historical significance of the coins produced during that period.

Item Denomination Series Year Mint
1938 1c-50c Proof Set 1c-50c Proof Sets 1938 Philadelphia