Order of the Red Banner Voroshilov factory #174
June 3rd, 2941
To the factory director
I ask you to order the Planning Department to begin preliminary development of the following:
- SU-51: ZiS-4 gun on the T-50 chassis.
- SU-52: AA SPG on the T-50 chassis.
- T-26-6: SPG with a KT-28 gun on the T-26 chassis.
This work is to be done on the orders of Marshall of the Soviet Union, comrade Kulik
- T-26-8: AA SPG on the T-26 chassis.
The project is open, but no work has been done."