Over at For the Record, they are reporting on a recent Yuri Pasholok livejournal post describing the T-39 Super Heavy Tank proposal.  These drawings are from 1933 and were created by the Kirov plant special design bureau under the leadership of N.V. Barykov.  The project only got as far as wooden models before being cancelled.  “Ensign Expendable” has written a more detailed description of the vehicle here.