After World War II, the Chistopol Watch Factory focused heavily on wristwatch production. This lead to a proliferation of discrete brands in the 1950s, all powered by Chistopol movements. These brands included Almaz, Chaika, Druzhba, Kama, Kolos, Mir, Pobeda, Raduga, Rubin, Saturn, Sputnik, Uran, Volna, Vostok, and Yantar.

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The Kolos brand (Колос, referring to cereals in which the flowers are located along the end of the stem, i.e. wheat) was produced in the 1950s and early 1960s. This line of watches was powered by rudimentary 15-jewel caliber 2602 movements and featured a number of unique dial designs, including elegantly embossing and detailed textures. The octagonal cases were also unique and included an unusually-narrow 14mm lug width. It is unclear whether the intended audience for these watches was men or women.

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The Kolos brand was retired in 1964, when the vast majority of brands from the Chistopol Watch Factory were consolidated under a single trademark: Vostok. Similar watches continued to be produced for a few more years in the 1960s, but only under the Vostok brand.