2014 One-Ounce Gold Eagle. Struck on a One-Once Gold Buffalo Planchet. MS-69 (PCGS).

31.1 grams, .9999 fine. Certainly the most fascinating U.S. Mint error on a modern bullion coin that your cataloger (JLA) has ever handled. The weight and fineness confirm the blunder, for one-ounce gold eagle planchets weigh 33.931 grams and are only 0.9167 fine. What is particularly intriguing is how this error was discovered, for in-hand inspection reveals what purports to be a "normal" Mint State one-ounce gold eagle. The surfaces are as made and pristine with bright medium gold color. Undoubtedly of the highest rarity, and a coin that would serve as a focal point in a specialized collection of major Mint errors.