Looks like a die chip on the top center edge of the book. There are a lot of die chips I've noticed on this series. Top the the shoulder, boot and upper boot with die cracks. I just used them for what they are to me: Die markers when searching through rolls of them.
nope, doesn't look like any of the varieties to me, the extra finger is ver prominent, it looks like a crab claw in between the thumb and forefinger. There are plenty of images out there especially a die variety news. Good luck, keep searching.