1936 Walking Liberty Half Dollar. Proof-66 (PCGS). This lovely premium Gem Proof would serve as the focal point in a superior quality Proof Walking Liberty half dollar collection. Brilliant surfaces possess an exceptional reflective finish. The strike is razor sharp throughout, and the overall appearance is suggestive of an even higher grade. The premier Proof half dollar of the type and also the rarest, the 1936 was produced to the extent of just 3,901 pieces.