Interesting - I agree with Jani, looks like a gun built in Weipert in 1929 by the NPw and numeric string, and yet the barrels show the German Eagle-crown-over-S 'smoothbore' proof mark along with the Weipert marks without any other German marks visible in the photos.
If the complete gun had been built in Germany there would be more German proofs on both barrels and action. The lack of any German proof on the action makes me think that the gun was built in Czechoslovakia and used a set of tubes out of Germany.
Like so many of these pre-WWII guns, establishing just who made it is unlikely, particularly in this case where any German marks on the barrels are unlikely to relate to the gunmaker and the only marks on the action body are Czech.
It's always a wonder to me that whomever made a fine piece like this wouldn't mark it. Unfortunately common, but still a wonderment.
