1937 Buffalo Nickel. Proof-67 (PCGS). CAC.,A smartly impressed, golden tinged example with a uniformly mirrored finish to both sides. The 1937 is both the final and most plentiful Proof Buffalo nickel, although survivors of this 5,769-piece issue that are as expertly preserved as the present Superb Gem are scarce from a market availability standpoint.,PCGS# 3996. NGC ID: 278Z.,,From the Alexander Collection.