Collectible coins include a variety of numismatic items such as rare dates, mint marks, and specific types. The American Liberty Gold coins, particularly those minted in San Francisco in 1891, are notable examples that appeal to collectors due to their historical significance and limited availability. The Twenty Dollar gold pieces from this era, commonly referred to as "Double Eagles," are particularly sought after for their gold content and intricate designs, reflecting the craftsmanship of the time. Collectors often focus on the condition, rarity, and provenance of these coins to determine their value.

Item Denomination Series Year Mint
1891-S $20 $20 (Twenty Dollars) American Liberty Gold 1891 San Francisco