Daimler's CO chassis became the main model in the 1930s, followed by a similar, but heavier, CW 'austerity' model produced during the Second World War (100 with the Gardner 5LW engine (CWG5), the rest with the AEC 7.7-litre engine – CWA6) and in post-war years, production worked through the Daimler CV to the long-running Daimler CR Fleetline, built from 1960 to 1980 (CVG5 and CVG6 had been a common type of bus in Hong Kong between 1950 and 1988 and Fleetline had also become a major type of bus in Hong Kong until 1995). Small numbers of single deck vehicles were also built. Many British bus operators bought substantial numbers of the vehicles and there were also a number built for export.