A note for modellers:
The protective boxes mounted on top of the rear mudguards, pieces A38 and A39, are the main distinguishing features between the two production models of this vehicle; the instructions as provided result in the BA-10M (modernised) version introduced in 1939. In order to assemble the original BA-10 as introduced in 1938, these two boxes should be omitted. These boxes contained two small external fuel tanks in the BA-10M, which were internal in the BA-10.
Sources:
J. Kinnear, Russian Armored Cars 1930-2000, Darlington, 2000
J. Prenatt, Soviet Armoured Cars 1936-45 (New Vanguard 284), Osprey, 2020