It is my understanding that Mauser (Oberndorf) began phasing out walnut stocks for laminated stocks in 1937. And I also believe Oberndorf phased out the 10 inch cleaning rod and began installing 12½ inch cleaning rods in 1939. So......, I have a walnut stock, covered with WaA63 marks, but made for use with the 12½ inch cleaning rod. I first thought it must have been a left over stock that was installed on either a 1939 or early 1940 manufacture 98k. But if it was a left over stock from 1937, that would also mean it would have been made for the 10 inch cleaning rod, which it is not. Was it a left over stock blank that was made into a stock during 1939-40? A bit of a mystery to me. Any thoughts?? Thanks!