What Unit Could This Be?

[Don M]

The other apparent mistake is that it is listed as 7.65 mm. I can't imagine that a Luger that started life as a 9mm military weapon, received the 1920 property stamp, was issued to the Schupo and remained in police service at least to 1934 was rebarreled for 7.65mm.

Looks like a pretty nice example of a Schupo Luger, though, despite the screwed-up description.