Yeah, BuHag was a state operated conglomerate that sold longarms with components from various makers such as Simson & Schuler for example. Looks like a very good deal for such a robust gun.
Early on from the 1893(law) rules, the German proof law very closely resembled the Enlish version. Choke bored tubes underwent 2 proofs(Article 2) with the diameter being measured at 22cm ahead of the standing breech. I think the definition that resulted in the stamping of the "Crown" over "W"-Wurgebohrung was 0.2mm less than the 22mm in front of the standing breech measurement. All other tubes were measured at the muzzle. Also in Article 7 a longarm that was intented to fire a single slug was proved with a slug 0.2mm less than the diameter at the 22cm ahead of the standing breech measurement. Then 1950, 1961, August 1968 & June 1974 still retained the "all or nothing" "Crown" over "W" mark which noted it was choked, but not degree noted. The only real change in the 1974 rules was that the tubes were proved at least twice with data recorded at 2 different locations. Just guessing, but yours may be before 1974.
Kind Regards,
Raimey
rse
