M/43 machinegun and observation armored cupola

He is also known as Panssarikupu in Finnish. On the right side of it is a machine gunner embrasure with a Maxim machine gun, a Soviet DT or a casemate version of the Suomi submachinegun, on the right is an observer-spotter of fire split. The cupola weighs about 13 tons, the thickness of the front armor is 240 mm. It is designed to withstand against 152 mm shells. There is also a hole for a periscope on top.