The D-10 is a Soviet 100 mm tank gun developed in late World War II. It originally equipped the SU-100 tank destroyers and was later selected for the T-55 tank, equipping these as late as 1979. On the
D-10S gun on an SU-100 tank destroyer
Versions of the D-10 were mounted on new T-54 and T-55 tanks until at least 1979, as well as on Chinese Type 59s. This is a German T-55AM2B.
D-10 tank gun in a T-55 tank
The 100 mm field gun M1944 is a Soviet 100 mm anti-tank and field gun.
D-10 tank gun
…of the barrel was also increased and the turret was furnished with new aiming optics, in some cases including a thermographic camera for night use. BS-3 - field gun 52-P-412 ZIF-25 - Casemates gun 52-PC-412…
BS-3 at the Israel Defense Forces History Museum, Israel
BS-3 at the Israel Defense Forces History Museum