Collectible coins encompass a variety of numismatic items sought by hobbyists and investors. In the United States, notable examples include the 1 One Dollar coins and the Kennedy Half Dollars. The 1 One Dollar coin series includes various designs, such as the Sacagawea and Presidential coins, while the Kennedy Half Dollar, first minted in 1964, commemorates President John F. Kennedy and features his portrait on the obverse. Both types are popular among collectors for their historical significance and varying minting years, making them valuable in the numismatic market.