Collectible coins, such as the 2016 United States coin issues, often encompass a variety of denominations, including dollars. These can include special releases, commemorative editions, and proofs that were minted in limited quantities. A "1 Roll" typically refers to a sealed roll of 50 coins, which can enhance their value as they are often more desirable to collectors due to their uncirculated condition. Collectible coins may also feature unique designs, historical significance, or special minting processes that contribute to their rarity and appeal in the numismatic market.