Collectible coins, often referred to as numismatics, include a variety of types, such as those produced by the United States Mint and privately issued patterns. The 1803 Two and a Half Dollar, also known as the quarter eagle, is notable among early American coins. These coins often reflect significant historical events, artistic designs, and varying mintages, contributing to their value among collectors. Privately issued patterns are experimental coins produced outside of official minting processes, sometimes serving as tests for new designs or compositions. Collectors often seek these unique pieces for their rarity and historical significance.

Item Denomination Series Year Mint
United States of America 1803 N/A Privately-issued "Patterns" $2.50 $2.50 (Two and a Half Dollars) Privately-issued "Patterns" 1803 N/A