A WWII-era BT-5 tank which sunk during a battle against NAZI troops in 1941 was salvaged from the Neva River in the east suburb of the Saint Petersburg city, Russia on June 18. The tank was reportedly built during the year of 1933 to 1935.
BT Tank [wiki] or, the Fast Tank was a series of Soviet 'cavalry tanks' which were produced in large numbers between 1932 and 1941. They were lightly armoured, but reasonably well-armed for their time, and had much better mobility than other contemporary tank designs. The BT tanks were known by the nickname Betka from the acronym, or by the diminutive version Betushka.