1921 Buffalo Nickel. MS-67 (PCGS). The Philadelphia Mint reduced Buffalo nickel output by 52.4 million coins between 1920 and 1921. Despite the significantly lower mintage, 1921 nickels are accessible through MS-66. The date becomes very scarce as a Superb Gem where this coin ranks among the finest certified at both PCGS and NGC. This 1921 representative is well struck, although not absolutely full, with radiant, frosty luster and traces of pastel-golden patina on each side. Registry enthusiasts should recognize the importance of this offering.