Read the historical text in the image. Actual image is larger. Very funny stuff. They built three of them.
FYI - They may have never actually built that Russian Land Battleship. Was an experimental design only. The historical text was apparently created by the illustrator. That is why it is so funny.
Any Sov tank at that time capable of holding up a German armoured division would have been a KV-1
And the supposed fates of the "KV-6"s are exactly what you might guess from looking at the picture.