According to pictures and videos published on the Internet Social Networks, Russia is sending T-62M and T-62MV Main Battle Tanks (MBTs) to Ukraine from its military stocks following the heavy losses of its modern tanks as the T-80, T-72, and T-90 during the combat operations in Ukraine.
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Russian army T-62M Main Battle Tank was spotted on a train moving to the Russian/Ukrainian border.  (Picture source Screen Shot Video Youtube)

Citing open source information, more than 750 Main Battle Tanks from the Russian armed forces would have been destroyed, damaged, captured, or abandoned. Citing a list published on Internet, Russia would have already lost 22 T-64BV, 18 T-72A, 7 T-72AV, 136 T-72B, 54 T-72B Mod 1989, 4 T-72BA, 118 T-72B3, 103 T-72B3M, 32 T-80BV, 2 T-82UK, 5T-80UE-1, 1 T-80UM2, 26 T-80BVM, 19 T-90A, 1 T-90M and 130 unidentified tanks.

Citing information from the Ukrainian armed forces, Russia was forced to deploy its reserves of T-62 main battle tanks in order to compensate for tank losses in the fighting in Ukraine. A video was published on Youtube showing the move by a train of T-62M and T-62MV tanks in Kamyansk-Shakhtinsk, Rostov, a Russian region bordering Ukraine.

The T-62M is a modernized version of the T-62 MBT that entered into service with the Russian army in 1961. The tank is always in service with the Russian army but in an upgraded or modernized version. The T-62M has the same armament as the first version of the T-62.

The T-62 is armed with a 115-mm two-axis stabilized smoothbore gun 2A20 (U5-TS). The second armament of the tank includes one 7.62 mm PKT machine gun mounted coaxially to the right of the main armament. A 12.7 mm DShKM MG machine gun can be mounted on the commander's cupola for the latest version of the T-62 variants.

The T-62M is fitted with a passive armor that is mounted to the glacis plate and around the forward part of the turret, consisting of steel with an additional layer of pheno-polyurethane inside. Additional armor is fitted under the forward part of the hull and a steel frame is provided between the floor and roof of the driver's compartment to help absorb the shock of a mine exploding under the vehicle.

The T-62MV is also an upgraded version of the T-62. The tank uses the same armament but it is fitted with "Kontakt-1" Explosive Reactive Armor (ERA) on the sides of the hull, the glacis plate, and in the front of the turret.

Russian T-62M Main Battle Tank (Picture source Vitaly Kuzmin)

Russian T-62MV Main Battle Tank (Picture source Vitaly Kuzmin)