From what I‘ve been able to find, from 1946 to 1951 the arms of the Bahnpolizei in the three Western zones were uniformly American, M1 carbines, 1911 pistols, and both 4“ and 5“ Victorys.
I know of a 4“ gun marked Stuttgart, and now this one marked Frankfurt, in the American zone. However, Charles Pate also lists Frankfurt and Augsburg as recorded on 5” British Service variants.
The fact that trains crossed sector boundaries all the time and the rail network was one structure likely was the reason that the Bahnpolizei also didn’t conform to those.
