That's a good find for $100! I have 1917 that showed the same wear pattern--but not with the heavy toning--and it graded PCGS AU58 too. It stickered with CAC, and is now with Great Collections with 31 other coins waiting to be photographed.
Thanks for all the comments. Tamaracian, will you be notifying us when your coins are up for auction?
Since you asked, I can do that when Ian advises me that they are ready to go live. The one that you'll probably be interested in how it does is the 1917 Walker in a PCGS AU58 Slab Cert #30966734 with a Green CAC Sticker. CAC has only stickered 11 at this level.
They are live now w/photos on Great Collections. To see a short description of 31 coins, you can go to the FOR SALE Forum.