Collectible coins encompass various categories, including commemorative, bullion, and historical pieces. In the United States, notable examples include the 50-cent George Washington pieces minted in 1932 to honor the 200th anniversary of George Washington's birth. The coin was designed by John Flanagan and features a profile of Washington on the obverse and a stylized eagle on the reverse. Additionally, the era of coinage began in 1792 when the Coinage Act established the U.S. Mint and designated the dollar as the standard unit of currency. Collectors seek these pieces not only for their numismatic value but also for their historical significance.