My father passed down a 250/3000 that has all the proper Niedner stamps on the barrel, the only serial numbers that I can find on the underside (in the stock) is a sideways 5 and then a in line with the barrel 02. From the story that he told me, Niedner only made 18 of this caliber rifles with the Mauser action, and it also has a spoon handle on the bolt. Any information that anyone could provide would be greatly appreciated. Once I figure out the site and such, I will take some pictures and post them to show what I mean about the barrel markings.