Collectible coins, particularly those from the United States, include a wide variety of types and denominations. The Liberty Head Double Eagle, valued at twenty dollars, was minted between 1849 and 1907, with the most notable issues being those from the 1850s. These coins feature an obverse design of Lady Liberty and a reverse with a majestic eagle, symbolizing freedom and national pride. The 1850 Liberty Head Double Eagle is particularly noteworthy for its historical significance and gold content, making it highly sought after by collectors and investors alike.