Collectible coins refer to various types of coins that are sought after by numismatists and collectors due to their historical significance, rarity, and condition. In the context of the United States, the nickel is a five-cent coin, notably represented by the Jefferson nickel, first issued in 1938. The 2001 Denver mint mark indicates that this specific coin was produced at the Denver Mint, adding to its collectible value, particularly if it's in a desirable grade. The half dime, a historical five-cent piece minted from 1792 to 1873, is also of interest to collectors but is distinct from the modern nickel.

Item Denomination Series Year Mint
2001-D (Denver) Jefferson Nickels 5¢ (Five Cents, Nickel, Half Dime) Jefferson Nickels 2001 Denver