Collectible coins encompass a wide range of numismatic items, including ancient, modern, and commemorative pieces. One notable type is the United States one-dollar coins, which have seen various designs throughout history. The Coronet Head cent, minted from 1816 to 1857, features a profile of Lady Liberty and is particularly significant in the 1826 Philadelphia minting, known for its limited production and popularity among collectors. These coins are valued not only for their monetary worth but also for their historical and artistic significance.