Collectible coins encompass a variety of categories including historical, numismatic, and themed pieces. In the United States, the One Dollar coin has various iterations such as the Eisenhower, Susan B. Anthony, and Sacagawea designs. Counterstamped coins, which feature alterations made post-minting, hold additional interest for collectors, as they often reflect unique historical contexts or personal sentiments. The year 1871 is significant for coin collectors due to notable issues, including certain coins minted during that time that can carry substantial value. Collectors may also find interest in coins marked with "N A," often indicating a particular grade or classification within numismatic organizations.