Question regarding fxo marked magazine.

[tacdriver]

Could I get some insight on this fxo-marked, E37 magazine that I have. It came with the â??kâ?? block byf 42 rig that I recently acquired.

My question pertains to the aluminum baseâ?¦ there are no serial numbers or other markings applied on it. Iâ??ve looked at it under a 10x loop and it appears unmolested. So with that said, was it common type and would it be correct for my rig

I donâ??t have any Luger reference materials at the moment (however that will change very shortly). Thanks for any responses in advance!