Factory #37 was supposed to begin production of T-60 tanks, but the reality was different. 187 T-40 and T-60 hulls were brought to Sverdlovsk, and the 45 T-60 hulls from that amount were really not 060 hulls, but T-30 hulls.
Since the amphibious equipment was not available, the factory began converting the hulls. At the same time, work on producing T-30 hulls with 20 mm of armour and no rear bay began. Existing hulls with thicker armour were used up first. 22 tanks were assembled in December, 20 of which were accepted. Problems with supplies of TNSh guns led to five tanks being armed with DShK machineguns. The first tanks built in Sverdlovsk drove in a parade through city streets. Due to a mix-up with indices it is often written that these are T-60s, but they were really T-30s.