The 1937-S Buffalo nickel is considered the most common San Francisco issue in the series, and it doesn’t take much to see how this claim holds water. With an estimated 9,000 survivors in MS65 alone, this piece is miles ahead of other S-mint Buffalo nickels in terms of overall availability, even among other 1930s San Francisco Buffalo nickels. What’s more, strike, luster, and color are usually great for the 1937-S nickel. A tiny handful of examples have been certified by PCGS and NGC as MS68s, and those pieces command huge sums.