Clad on both sides in 24K gold Full-color two-sided certificate of authenticity included with each coin 1.25" (32 mm) in diameter The original $50 Gold Buffalo Coin is one of the purest gold coins ever made in America. It was the first one ever struck using .9999 Pure 24 KT Gold. Its design was based on the famous Buffalo nickel minted from 1913 to 1938. Wildly popular with investors and collectors, production stopped because of a temporary shortage of specially made gold blanks. Now, you can reserve your own tribute proof of the $50 Buffalo Gold Coin clad in 14 mg of 24 KT gold.