[merc]

Hi guys
I know this is not a Luger, but figured someone in the General discussion area may point me in the right direction.
I just picked up a nice Mauser Boom Handle
On the right side it has the ser. no. 650xxx,
9mm parabellum on the barrel, and the Mauser symbol.
on the left it says Waffenfabrik Mauser
Oberndorf Necker
on the top Waffenfabrik Mauser OberndorfFN
1st can anyone tell me anything about this gun and 2nd is there any online referance tables to explain Mausers?
Thanks