Collectible coins are often categorized based on their historical significance, rarity, condition, and demand among collectors. One notable type is the American Liberty Gold coin, which has been issued in various forms and denominations, including the Twenty Dollars coin. The 1878 Twenty Dollars coin, minted in San Francisco, is particularly sought after due to its historical context and the limited number produced. Collectors often covet coins from specific years or locations, like the San Francisco Mint, as they can carry higher values based on their scarcity and condition.

Item Denomination Series Year Mint
1878-S $20 $20 (Twenty Dollars) American Liberty Gold 1878 San Francisco