Collectible coins, particularly in the United States, encompass a variety of types including historical, commemorative, and error coins. The 1979 One Dollar coin, specifically the Susan B. Anthony dollar, was minted in Philadelphia and is notable for its design and composition. Patterns, which are trial strikes or experimental coins not intended for circulation, hold a special place in numismatics as they offer insights into design changes and minting processes. Collectors often seek such coins for their rarity and significance in the evolution of American currency.

Item Denomination Series Year Mint
(1979) P$1 Copper-nickel clad J-2175 $1 (One Dollar) Patterns 1979 Philadelphia