I also have a newly acquired German bolt rifle. I just picked it up this weekend at a local show. It has 29 1/8" Krupp 1/2 octagon barrel, full rib, greener safety, etc. It was made by A. Kleszczewski in Berlin in 1927. The only marking on the reciever ring is the 2.75gGBP - no proofs, caliber (it is 8X57J), Oberndorf, nothing. I'm a little confused. The odd barrel length & price are what drew me to it. I will email some pictures to the above address.