関東自動車工業
Produced at Kanto Auto Works from January 1955 to November 1956 (Master sedan); a total of 7,403 RR sedans were built. About 12,000 RR16 and RR17 Masterlines were also built by Kanto, while the double cab RR19 was built by Central Motor Co. It is not known how many RR19s were built, but Central Motor Co. assembled a total of 43,241 double cab Masterlines and Crowns (from four generations) until December 1970.