Collectible coins are often categorized by their rarity, historical significance, and condition. One notable type is the United States 1 One Dollar coins, which include various designs and series released over the years. Patterns are experimental coins created to test new designs or technologies, and the 1979 issues are particularly sought after by collectors. These coins can hold significant value based on their rarity and the interest of collectors.

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