TM-3-12 railway gun, Great Patriotic War Museum, Moscow, 29 August 2015 1. 305mm (12 inch) gun of a very successful type originally built for Russian battleships and for coastal defence. About 180 guns were built from 1910. Three railway mountings were built, using guns salvaged from a sunken battleship. All three took part in the 1939 - 1940 Winter War between the USSR and Finland. All three were captured by the Finns and used against their former owners. The guns were later returned to the Soviet Union, which kept them in operational condition until it collapsed in 1991. The railway guns had a crew 50 and a total weight of 470.9 tonnes. The other TM-3-12 railway guns are preserved in the Central Musum of Railway Transport at Varshavsky station, Saint Petersburg, and the Krasnaya Gorka coastal fort near Lomonosov, west of St Petersburg. Here are 13 views of the Moscow gun.