T-29 Torsion Bars

The T-29 is a fairly well known successor to the T-28, largely being the same tank but on a Christie suspension. It is also fairly well known that T-28 has a prototype with torsion bars. However, here's a rare combination of the two, a T-29 with torsion bars (Object 115).

V. Lehn Collection

"Torsion bar suspension (designed by personal initiative)

1. Design of the "torzion" bar suspension on the T-29 tank.
2. A proof of concept of the "torzion" bar suspension (1937-1938)"

And yes, it is written "torzion" in the original, including quotation marks.