1936 Walking Liberty Half Dollar. Proof-66 (PCGS). CAC. This fully struck and well mirrored specimen is untoned apart from the lightest silver-gold tinting that is note readily evident at all viewing angles. The first Proof in the popular Walking Liberty half dollar series, the 1936 is also the scarcest, with a mintage of just 3,901 pieces. PCGS# 6636. NGC ID: 27V4.