Collectible coins refer to numismatic items that hold value beyond their face value due to factors like rarity, demand, condition, and historical significance. In the United States, collectible coins include denominations such as the 1 cent (penny) and 50 cents (half dollar). Proof Sets, particularly those produced in 1956 from the Philadelphia Mint, are highly sought after by collectors due to their limited mintage and high-quality striking, which features a mirror-like finish that enhances their aesthetic appeal.

Item Denomination Series Year Mint
1956 1c-50c Proof Set 1c-50c Proof Sets 1956 Philadelphia