1917-S Walking Liberty Half Dollar. Obverse Mintmark. AU-55 (PCGS).,Brilliant surfaces retain overall bold striking detail and ample satin luster. One of just two San Francisco Mint Walking Liberty half dollars with the mintmark positioned below the motto IN GOD WE TRUST, the 1917-S Obverse is also a key date issue in its series with a mintage of 952,000 pieces. Survivors are particularly elusive at and above the AU level of preservation, as here.,PCGS# 6572. NGC ID: 24PT.,,From the Graywood Collection.