1921-S Walking Liberty Half Dollar. AU Details--Cleaned (PCGS).Boldly to sharply defined, this minimally circulated survivor exhibits a splash of pale gold obverse toning to otherwise pewter gray surfaces. Both sides are muted in appearance with a curious matte-like texture that explains the stated qualifier. With the amount of detail that it retains, this is still a conditionally scarce survivor of the low mintage, key date 1921-S half dollar.