At the risk of stetching this thread to the breaking point, I'd like to toss out one more puzzle about this gun.
When I field-sripped the gun to clean it, I discovered that the firing pin was stamped with the matching 4-digit S/N and had three longitudinal grooves.
[IMG]3299q_firing_pin_copy1.jpg [/IMG]
I think I have read somewhere that Mauser began putting serial numbers on firing pins in 1930. Also, Henrotin, in his ebook on Luger Mechanical Features, says that Mauser added longitudinal grooves to firing pins in the 1930s.
The consensus of the discussion in the above thread is that this gun was manufactured by DWM (BKIW?) about 1927 as a commercial model, barreled (or maybe rebarreled) as 9 mm and issued to the Police School in Muenster (probably).
My question is how did a 1930s Mauser firing pin end up in a DWM pistol manufactured in 1927 with the proper S/N?
Don