Missing Mantlet
Drzonowska cannon with serial number 406 was produced in 1944 at Factory No. 9 in Sverdlovsk or Factory No. 221 "Barrikady" in Stalingrad. Unfortunately, it came to the museum without a muzzle brake.
The tower with the number 40524 stamped on the ceiling slab, after removing it from a damaged tank belonging to one of the Guard's heavy tank regiments, was set up on a Soviet training ground as a target or an observer of artillery fire. In 1989, it was included in the museum's collection, handed over by the Russians from the unit in Świętoszów, where the 20th Armored Division of Zvenigorodz was stationed until May 1992
http://www.muzeum.drzonow.eu/index.php/eksponat-wrzesnia-2021