1919-S Walking Liberty Half Dollar. AU-55 (PCGS).Untoned with appreciable luster for the assigned grade, this is an uncommonly well defined coin for an issue that is typically offered in only the lowest circulated grades. Due to extensive commercial use, the 1919-S is scarcer in AU and Mint State grades than even a relatively limited mintage of 1,552,000 pieces might imply.From the William J. Naddeo Collection.