Collectible coins encompass a variety of types, including numismatic coins, bullion coins, and commemorative coins. The United States quarter, specifically the 25 cents piece, has seen many designs and series, with notable issues such as the state quarters and America the Beautiful series. California Fractional Gold coins, originally minted in the mid-19th century during the California Gold Rush, are small denomination gold coins that were used as currency due to the gold scarcity. The 1866 date marks a significant year in coinage history, as it was around the time when the U.S. began to standardize its coinage and introduced the concept of legal tender alongside gold and silver.

Item Denomination Series Year Mint
1866-- (Unknown) California Fractional Gold 25¢ (Twenty Five Cents, Quarter) California Fractional Gold 1866 Unknown