I found this artillery shell yesterday (100-120 year old house's attic) alongside some other german items. Relics from the german 1. panzer division which fought there in late 1944.
Interestingly this is an early copper shell.
24, 131, 1936, WaA270 with eagle, 6350, S.F.H.18
So it was produced in 1936 (Berlin-Borsigwalde)