Collectible coins include various types that appeal to numismatists and investors, such as commemorative coins, bullion coins, and historical currency. Among United States coins, the One Dollar coin has seen various designs, including the Sacagawea and Presidential series. The Roosevelt Dime, introduced in 1946, commemorates President Franklin D. Roosevelt and remains a popular choice for collectors. Coins from specific years, such as the 1981 Roosevelt Dime, may hold interest due to their rarity or minting variations. Additionally, the designation "N A" typically indicates that a coin has not been assigned a specific grade or value in certain grading systems.