Nice Luftwaffe belt and buckle here with a unit mark. I�m not sure if this unit mark is for an infantry M.G. unit or a possible related flight squadron. Any help would be appreciated.

My guess would be Heer, as I don't believe Luftwaffe units were formed in such a fashion.

Dow, I don't know if this helps or not, but it looks more like an early Army marking, not that they did a lot of marking. And with a number of Luftwaffe items they stamped an L.B.A. (Luftwaffe Bekleidungsamt) marking if it was Luftwaffe property. Best Regards, Fred