Forgive me if I've missed discussion on this subject before, I did do quick search before starting this thread. I was at a chapter meeting today, and came across a 16s Philadelphia tutone gold filled case. The bezel and back were white engraved gold filled , while the frame was yellow gold filled. I checked, and the serial number on the case back and the frame matched. Anyone ever seen such a case before? I don't have pictures, as I didn't make the purchase.