This 1991 S Mount Rushmore Half Dollar is a stunning example of a commemorative coin. With a strike type of proof, this coin has a fineness of 0.9 and was minted in San Francisco. The coin features a beautiful design of Mount Rushmore and has been certified by NGC with a grade of PF 69 Ultra Cameo. The denomination of this coin is 50C and it is composed of modern silver/clad. The variety of this coin is Mount Rushmore and it has a KM number of 4180729-013. This coin is a valuable addition to any collection and a must-have for any coin enthusiast.