I've recently taken ownership of a trench art cartridge from a Stalingrad digger I sometimes buy from. I am curious as to the origin of the cartridge. I can see the markings '23g' and on the opposite side what looks like a '38' or '88' and a '9'.
The measurement across the base is 25mm. Is this German, Soviet, Anti Aircraft or perhaps aircraft ammunition?
Any information would be much appreciated.