Ok, thank you for the information. They were most likely development tanks in between OT-130 and OT-133. Probably just one or two made.
Btw. There were also two OT-134 tanks produced based on T-26 m1939 that had the flamethrower in the hull and retained the 45mm tank gun in the turret.
http://www.armchairgeneral.com/rkkaw...-26/OT-134.htm