Commercial Pre-War luger in Police Service

[Daniel76]

I posted a couple of pictures of this pistol in another thread, but felt it may be worthy of it's own post here to clear up some questions. I believe it is an early (1910-1912) 5-digit serial number commercial pistol that was later pressed into police service during the Weimar and perhaps NS era. It is all matching (sans the grips which only have letters and no numbers), with an arsenal refinish. It is typical of the early commercial guns in that is has no stock lug. It also has the '1920' property stamp.
It is fitted with the sear safety, and was also fitted at one time with a magazine safety, as evidenced by the welded up and refinished slot on the left of the frame, and the small cut-out on the left grip. The barrel contains two Eagle/33 stamps, and the left side of the barrel extension contains the serial number, the letter 'G', and the typical 'B' and 'U' under crown proofs. The magazine is a Haenel/Schmeisser model that is serial numbered to the gun, with a Weimar era police eagle and the number '2' stamped on the bottom. Although I can find no evidence of a hold-open externally, the toggle remains locked when extended with a magazine in place.

The only marking I have not been able to figure out is on the right side of the barrel extension. It is a lazy 'S' with what appears to be a crown over it. I'm off to do some reading to see if I can figure out what it is. Thanks for looking and any comments and/or corrections to my novice interpretations are welcomed.