I think I made a mistake, not german but russian...
I you have more informations, thanks
Very interesting most likely russian buckle from 1800s ive never seen one like this !!
I dont like it the plate on the buckle appears to be a recent addition
similar WWI GERMANY HESSEN.www.das-koppelschloss.de
thanks for your help
Hessen, not sure
the hallmark is russian...