The 1973-S 50C (Proof) Kennedy Half Dollar is a valuable coin minted in San Francisco, California. This coin features a unique composition of 75% copper and 25% nickel over a pure copper center, making it a distinctive piece in the series. With a strike type of proof, this United States coin showcases the iconic image of President John F. Kennedy on one side and the Great Seal of the United States on the other, making it a desirable addition to any coin collection.