Collectible coins encompass a wide range of types including various denominations and historical significance. In the United States, the five-cent nickel and half dime are notable examples, with the Jefferson nickel being a prominent issue since 1938. The 1965 Jefferson nickel, produced during a time of transition in coinage, is often sought after by collectors. The term "unknown" can refer to the lack of established value or rarity designation for certain coins, which can affect their desirability among collectors.

Item Denomination Series Year Mint
1965-- (Unknown) Jefferson Nickels 5¢ (Five Cents, Nickel, Half Dime) Jefferson Nickels 1965 Unknown