You surely have not the answer, but do you imagine this plane was in a training school since the begining?
We surely have the answer for plane No 1: It was photographed at the Pruzhani airfield in Belaruss
and it belonged to 33 IAP (33rd Fighter Regiment)
. Experts on this subject have figured that this was actually regiment commander's plane
You got it right, between 1937 and 1940 only 3 colours were in use: green, gray and silver.
But, those two I-16 were more likely overall gray!!! More precisely AE-9 gray for metal parts and AII Gray for fabric/plywood. Reasons/sources
1. I-16 Type 10 manual from 1939, scans available on the net, specifies gray nitro paint for lower surfaces.
2. Maslov in his last I-16 book explaines that undersurfaces were painted in gray and then coated with transparent nitro varnish.
So my guess for fancy No 1 is: gray for metal parts and varnished gray for fabric covered parts!!!
The transparent varnish makes the difference between the two.
I wonder what did Pilawskii say for this I-16???
One of my books has a little information on this plane.
Also could you tell me the book for the 33 IAP identification of this I-16 I think I would like to get that one.