Hi Markus never seen anything like this before to be honest, not with the holes cut away from it anyway. Could be a sympathisers buckle of some sorts? Marked with DRGM and CWZ I wonder if that could be an early C W Motz maker mark?
A friend has a buckle a lot like this but with no markings . He picked it up a couple of years ago for around $50. I showed him an identical buckle at the SOS. That dealer has had the buckle for years priced around $1100.
It's about 4 month to the SOS. I'll take some photos if he still has the buckle.
at that price I would think he has still got it.
A first for me. I have no idea who could have used this.....leaning towards sympathizer buckle if it's legit.