Well I didn't buy the rifle but might, if the price is right of course.
I don't think the "Bear" stamps are fake, but strange as I've not seen a K98icon with those stamps before. The odd thing to it is they are right where the NAZI proof marks would be- left side of the receiver and barrel and bolt. It had some of the inspection stamps etc as a regular production but the serial number issue on the bolt and receiver (they look post production stamped) and the bear stamp thing.
Thanks for your answer- I'll follow up