Gundlach periscope technical
Vickers Tank Periscope MK.IV

It was the first tank in the world to be equipped with a diesel engine and 360 Gundlach periscope.

The Poles modified it with larger air intakes, their own machine gun, 360-degree Gundlach periscope.

Even today, original Gundlach periscopes are used in some tanks and APCs.

In USSR the Gundlach periscope was known as MK-4 (harking to the British designation, as Russian sources openly confirm that it was copied from samples acquired with British-supplied tanks) and implemented in all tanks (including the T-34 and T-70).

Churchills made use of the Vickers Tank Periscope MK.IV.

It was produced as Vickers Tank Periscope MK.IV (pictured), and build into all British tanks (Crusader, Churchill, Valentine, Cromwell).

The Vickers Tank Periscope MK.IV was invented by engineer Rudolf Gundlach and patented in 1936 as the Gundlach Peryskop obrotowy.

Vickers Tank Periscope MK.IV - the first device to allow the tank commander to have a 360-degree view from his turret, invented by engineer Rudolf Gundlach (1936)

Shortly before the war it was given to the British and became known as the Vickers Tank Periscope MK.IV and was used in almost all tanks of WWII, including the British Crusader, Churchill, Valentine, and Cromwell and the American Sherman.