Collectible coins, especially those from the United States, include a variety of denominations and types. The 1-cent coin, commonly known as the penny, features several design variations and years of mintage, including the iconic Lincoln penny introduced in 1909. The 1921 penny is a notable year within the collection of cents, as it falls within the time frame of the Wheat Ears reverse design, which was produced from 1909 to 1958. Collectors often seek out specific years like 1921 for their historical significance and potential rarity. Rolls of 1-cent coins can also be sought after by collectors for their convenience in storage and their potential to contain higher-grade or rare pieces.