Collectible coins, such as those from the United States, often include various types like Proof Sets, which feature specially produced coins with a high-quality finish. The 1988 Proof Set consists of coins minted for that year, including the Lincoln penny (1c), reflecting a shiny, mirror-like surface. These sets are sought after by collectors, not only for their aesthetic appeal but also for their potential investment value. Collectible coins can vary significantly in rarity and demand, influencing their market prices.

Item Denomination Series Year Mint
1988-S 1c-$1 Prestige Proof Set 1c-$1 Proof Sets 1988 San Francisco