1921-S Walking Liberty Half Dollar. AU-55 (PCGS). CAC. A generally untoned example with plenty of original frosty mint luster evident under a light. From a mintage of just 548,000 pieces, one of the lowest among half dollars of the popular Walking Liberty design type. The 1921-S is particularly elusive in grades above VF, as here, and even more so with quality that is strong enough to attract CAC approval at the certified grade level. PCGS# 6585. NGC ID: 24R8.