The 1938-2023 Jefferson Nickel Collection Complete Set includes all proof coins, featuring a circulated denomination of 5 cents. Minted in locations such as Philadelphia, Denver, and San Francisco, these coins are composed of copper and silver with a fineness of .75 copper and .35 silver. This set offers a comprehensive collection of Jefferson nickels from 1938 to 2023, showcasing the historical significance and craftsmanship of these iconic coins in the United States.