Collectible coins encompass a wide range of numismatic items, including historical coins, error coins, and commemorative pieces. The fifty cents denomination in the United States features a variety of designs, including the Walking Liberty, Kennedy, and Franklin half dollars. Patterns and trial coins, such as those produced in 1935, refer to experimental pieces created to test new designs or manufacturing techniques before official production. These items are highly sought after by collectors for their rarity and historical significance.

Item Denomination Series Year Mint
1935-- (Unknown) Patterns & Trial Coins 50¢ (Fifty Cents) Patterns & Trial Coins 1935 Unknown