"Condition of SPGs and artillery systems on the T-26 chassis
T-28-8: 37 mm AA gun on the T-26 chassis.
According to instructions from the NKSM and tactical-technical requirements developed by the 20th department of the GAU, an experimental prototype of a 37 mm AA gun on the T-26 tank chassis was developed in July and tested.
Trials gave a positive result. Presently blueprints are being developed that include improvements requested by the ANIOP. Production of two prototypes to send to the front is being finished.
Final work on blueprints for mass production will conclude on August 25th, 1941.
T-26-7: 57 mm ZIS-4 gun in a turret for installation on the T-26 chassis. The design is complete and blueprints are nearing completion.
T-26-6: 76 mm KT gun in a turret for installation on the T-26 chassis. The design is complete and blueprints are nearing completion.
No directions have come from the NSKM or GAU with an evaluation of continuing the work. We have prepared a letter for the NKSM, GAU, and GABTU regarding this."
