Collectible coins, particularly from the United States, include a variety of types such as circulating coins, commemorative coins, and bullion coins. The 10c denomination refers to the dime, which has featured various designs over the years, including the Mercury and Roosevelt dimes. Proof sets are specially minted collections of coins that are produced for collectors, showcasing a higher level of detail and a mirror-like finish. The 2023 Proof Sets, minted in San Francisco, include various denominations and often highlight specific themes or anniversaries. These coins are sought after for their aesthetic appeal and potential for value appreciation among collectors.