[1] During 1932, the PE sight system underwent several changes, mainly to the adjustment unit and to the shape of the lens tube.

By the beginning of 1933, development of the PE design was completed, and there were so many innovations that the plant tried to report on the creation of a “sight of the 1932 model,” but such an initiative was not supported by management.

[1] The optical system, consisting of nine lenses, was borrowed from the developments of the Zeiss company and tested on the Soviet PT sight.

German and Finnish troops also used captured PE sights, not only with standard Soviet sniper rifles, but also with weapons of their own production.

[1] In July 1943, comparative tests of PE, PU and captured German sights were carried out, based on the results of which it was concluded that the PU was not inferior to the PE in combat properties, and significantly superior to it in terms of weight, size, technology and performance.