Collectible coins include various types such as commemoratives, bullion, and mint sets, with a popular category being Proof Sets. These sets typically feature coins struck with a higher quality finish, often in limited quantities. The 1957 Proof Set from the Philadelphia Mint includes coins like the 1 cent (1c) and 50 cent (50c) denominations. Proof coins are characterized by their reflective surfaces and sharp details, making them highly sought after by collectors. The United States of America, particularly in the mid-20th century, produced several noteworthy Proof Sets that are now valued by numismatists.

Item Denomination Series Year Mint
1957 1c-50c Proof Set 1c-50c Proof Sets 1957 Philadelphia