Collectible coins include a variety of types, such as currency from different countries, commemorative issues, and historical pieces. Counterstamped coins are those that have been altered by striking an additional mark or design onto their surface, often used for advertising or to signify a special event. In the United States, coins such as the four-dollar gold piece, minted during the early 19th century, were produced in limited quantities and are sought after by collectors. The year 1814 is notable for various numismatic releases, including those from the War of 1812 era.