Off topic…
The article on the Svema plant states that there was a three-layer natural color film produced in 1936 (at the Shostka/Svema plant?). This is utmost questionable. I read this for the first time.
The German Agfa film plant at Wolfen was a Soviet-owned company between 1945 and 1953 and affiliated to the Shostka plant (about half of the plant was moved to Shostka). A lot of Agfa experts worked there in the mid-40ties (including work on color). From them there was no report later about such a film. The commonly reported date of birth for such a Soviet film is 1947.
Notwithstanding I am eager to learn about any earlier film. Most probably behind this all is a typing error concerning the decade…