T-54/T-55 operators and variants - Wikipedia
T-54-1 (Ob'yekt 137) or T-54 Model 1946 Produced 1946–1948. With a streamlined turret and wide gun mantlet, similar to T-44, new V-54 engine, unstabilized D-10T 100 mm main gun, and two SG-43 machine guns in bins on the fenders. Only a small number was built for trials that were a fiasco; as a result, the production of the T-54 series was halted until the implementation of modifications.
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