12-inch gun's breech - bottom view

In 1940, three pieces of TM-3-12 with another 12-inch guns were transported to the Soviet naval base in Hanko (Finland). Before evacuating this base in late 1941 the barrels of their guns where damaged by Soviets, but the Finns regained transporters and mounted there barrels from Alexander III (on the photo). These guns were at Hanko till Finland's defeat in 1944 and after that the transporters with guns were returned back to USSR, to Krasnaya Gorka fort.