The barrel steel type just may be >>Spezial Laufstahl Bochumer Verein<< or some variant. Being made in the West, I do not think there were a lot of barrel steel variety and I am not sure just how many steel types were available?
I believe the following text is in the J.P. Sauer Text:
>>The Model S/53 Drilling was sold by Sauer from May 1953 onwards. It used a special new barrel hammering process which Sauer first started using in December 1952. (This was one of the reasons Weatherby went to Sauer to make his rifles, so he could boast he was the first to market this cold-hammering process in the US). It also meant that the barrels were particularly smooth, increasing their longevity. This process had been developed at the Berlin-Lübeck engineering works for manufacture of military weapons towards the end of the war and when Walter Spiegelberg bought Alket/Borsig hammer machines, Sauer were subsequently the first hunting gun manufacturer to offer this feature. The first produced Sauer Drillings were quickly sold out.
Apart from this, I think the post-war Sauer Drilling was little different to the pre-war Model 30 Drilling except for some cosmetic differences.
The Allies forade(forbade?) the use of the name Krupp on the barrels after 1945, so these were stamped instead (in German) Bochumer Association special barrel steel. Bochum was the place where this steel was produced. The history of the type of steel goes back to 1893 when the high-quality chrome-molybdenum steel was jointly developed by Sauer and Krupp and initially Sauer used it exclusively.......<<
Serbus,
Raimey
rse
