Collectible coins, particularly in the context of the United States, include various denominations and gold pieces, such as the Two and a Half Dollars. This denomination, also known as the Quarter Eagle, was first minted in 1796 and remained in production intermittently until 1933. Territorial gold coins, often struck by private mints in the mid-19th century, including pieces from 1851, represent a significant aspect of U.S. numismatic history, showcasing the economic conditions and gold rush phenomena of the era. Unknown mints or lesser-known issues may add to the intrigue and collectibility within this market.

Item Denomination Series Year Mint
1851-- (Unknown) Territorials $2.50 (Two and a Half Dollars) Territorials 1851 Unknown