1917-S 50C Walking Liberty Mintmark Reverse PCGS MS64. A semi-key to the series and popular. Although not blast white, this specimen does show a thin veil of uniform toning. Our imaging does make the coin look more “brown” than it really is – it’s more of a deeper gray/silver. Ten years ago the 1917-S Reverse Mintmark had a published price of $5,000. Today it can be acquired for slightly half of that price. We note that an auction description from 2006 (HA 8/06:3480) states that PCGS has only graded 49 finer. Today, that number is 75 with the incorporation of the “+” grades. Not a terribly significant increase for an 11-year time span.