The Datsun truck line began with the Type 13 Truck of April 1934, and was later used as the basis of the Datsun DC-3 roadster. A series of small trucks based on their passenger car counterparts, the 14T, 15T, and 17T, continued to be built until early 1944. This was followed by the near identical post-war Datsun 1121 (1946) and 2124 (1947–1949). In 1949 the 3135 took over, followed by next year's Datsun 4146. In 1951 the 5147 appeared, which was succeeded two years later by the 6147. Aside from a bigger and more modern engine (with 25 PS or 18 kW), the Datsun 6147 was nearly identical to the prewar type 15 truck. This was built until the 1955 introduction of the all new 120-series truck.