Collectible coins, particularly in the United States, include a variety of types such as the One Dollar denomination and Coronet Head Cents. The One Dollar coins often feature significant historical figures or symbols of American heritage. The Coronet Head Cents, produced from 1816 to 1857, are notable for their design, which was first introduced in 1816, with the 1823 issue minted in Philadelphia. These coins vary in rarity and condition, impacting their value among collectors.