I missed this thread, over the years! I have sn 694106, a 2" .38 M&P. It's marked B P D 118M, and was shipped to the Boston PD July 7 1940. I wrote a story about this gun, and 694105, an identical gun. The BPD order was shipped, because LEO's were exempt from DSC controls. 694105 did not ship until late 1946, along with a whole bunch of 2" M&P's.

Regards, Mike Priwer