Collectible coins, such as those from the United States, can be categorized by various historical periods, denominations, and mintmarks. The Five Cents Nickel and the Half Dime are notable examples of U.S. coinage, with the Seated Liberty design appearing on both. The Seated Liberty Half Dime was minted between 1837 and 1891, with the 1842 issue being particularly sought after by collectors. Coins minted in New Orleans carry the "O" mintmark, making them of special interest due to their limited production compared to coins minted in Philadelphia or other locations.

Item Denomination Series Year Mint
1842-O (New Orleans) Seated Liberty Half Dimes 5¢ (Five Cents, Nickel, Half Dime) Seated Liberty Half Dimes 1842 New Orleans