UBB.threads Forums General Militaria Historic and Period Firearms Forum seeking help to identify unit markings on a P08

Good morning to all.

I'm a new member looking to understand the markings on the grip of a P08 made in 1918 by DWM. I'm told it was originally an artillery model shortened in 1920 and assigned to the Weimar Republic police.

As far as I can see, there are two series of numbers: the first (lower down on the grip) was crossed out by big Xs, and a second series further up the grip partially overlaying the first one.

The lower series is S.B.31.3.5.3 (or 8?)

The upper series is S.D. IV.3.33; here, the 33 is smaller.

A picture is attached [img]https://imgur.com/MZ0pA2n[/img]

Any help in making sense of these markings would be greatly appreciated.