The GOMZ factory produced binoculars in the 1920's-1930's, it stopped production of their own design B-1 6x30 model in 1936. In 1940 it restored binocular production, but this time it produced the standardized B-6 6x30 model. Production continued until the Autumn of 1941, when due to the German and Finn offensive on Leningrad, part of the GOMZ factory was evacuated to Kazan, and included into the structure of Kazan optical-mechanical factory. Technically, production of GOMZ binoculars ended in Autumn 1941, but during the initial production period in Kazan, the factory still used the GOMZ logo (stylized ray of light).

The post-evacuation marking is missing the hammer and sickle, which were used during 1940-1941 production in Leningrad. In early 1942, the factory marking was moved to the bridge instead of the left plate. Also, in early 1942, the factory finally started to use the GOMZ logo on binoculars (also a stylized ray of light). During 1940-1944, the production year was coded into the two first letters of the serial number (40, 41, and so on), starting in mid 1944 and later, a full year marking under the serial number was used.

After evacuation factory introduced many simplifications to construction. Late 1941 - early 1942 binoculars had plates made from silicium - aluminum alloy (sometime alloy plates are mixed with old design brass plates at one binoculars), later in 1942 alloy plates were replaced with steel plates, and steel plates in 1944 were replaced with copper plated steel plates. Also in early 1942 was eliminated rubber finish on the tubes (tubes were painted only with black paint), brass eyepiece diopter adjustment sleeves were replaced with cast sleeves also made from the silicium - aluminum alloy, also alloy was used in production of the other parts instead of brass, brass caps of the objective lens assemblies were replaced with steel caps. Because of these reason original condition early-mid war KOMZ binoculars are very difficult to find, alloy became very brittle after some use, and many of these binoculars had replaced parts.

In 1943 (possibly late 1942) rubber finish of the tubes was returned to production (prewar pattern was changed to unique to KOMZ dot pattern), cast alloy eyepiece sleeves remained in production up to 1945. In 1946 was returned into production prewar pattern with brass parts, also was changed style of the markings - they were moved to the left pate, and hammer and sickle marking was used again.