Newbie - What Model?

Looked at a friends brothers Luger yesterday. Using the

Blue Book could not determine what model he had. Was a

WW11 bring back. Following markings no dates

DWM

Mid 3000 ser #

app 4 inch barrel

under barrel 2 birds? with N under one and a U or J under

the other and 9/m below them

GESICHERT by safety


Any help would be appreciated

Thanks

Bill