Anymore info on that shell, e.g. name, yield, year etc? It looks slightly different from the RD4-01, but not by much.
If you click on this link:
It will take you to Vitalys wonderful site showing the Military-technical forum ARMY-2022 - Exhibition pavilions.
If you scroll down the page the third and fourth images are of a nuclear bomb (RDS-4), and then below that a 203mm nuclear shell (RD5-1), then a 152mm nuclear shell RD4-01.
The two images I already posted I got from this forum, but I think they are Vitalys.
I labeled them 152mm nuclear 2.5KT.
Some rubbish on this thread that needs to be trimmed... or should I say is now in the process of being trimmed.