of military products. Duple also built double-deck highbridge and lowbridge buses to utility specifications, and the only new single-deck vehicle to be produced from 1942 to 1945, the Bedford OWB. Postwar expansion In 1946 the name of the business was changed to Duple Motor Bodies Limited. The first postwar production model to appear was the Duple Vista body on the Bedford OB chassis. The standard seating capacity soon became 29, although models with different capacities were still available. The Vista coachwork remained Duple's standard OB body until production of the OB chassis ceased in the early 1950s. Deliveries of Duple bodywork on full-sized chassis (such as the AEC Regal) began in May 1946, and were known as the A-type, although its curved lines had their origin in the prewar period, so it was not strictly a new design. Before long the order book was filled for several years ahead. Postwar rebodying became common practice as new chassis were initially hard to obtain and Duple built many A-type bodies on different chassis that helped to make it, with its distinctive side 'flash', a familiar sight in postwar Britain. Alternative styles were available, all with alphabetic codes, such as the B-type and C-types, which differed in detail only and were regarded as 'dual-purpose' bodies, whilst the D-type was Duple's own design of bus body. After the war, there was a move towards metal-framed bodies, partly because of their greater durability and partly because of a shortage of timber for traditional bodywork. Duple designed a metal-framed body (the Almet) for export models on the OB chassis, as well as producing a body design for the new SB chassis, then under development. By 1948, Duple had developed a metal-framed double-deck body, examples of which were delivered to the Red & White group and Scottish Motor Traction. 1950s In 1950, a range of full-fronted coach bodies named the 'Ambassador' was produced, but with the maximum permitted length for coaches increased to 30 ft and the maximum width to 8 ft, a series of new designs was prepared. Many were given names, such as the Roadmaster and Vega, all intended for use on specific chassis. The Roadmaster particularly was unlike anything Duple had previously produced, with its high, straight waistline and small windows. It earned the nickname 'Iron Duke' and was intended for underfloor engined chassis, hence the higher waistline. The Vega was intended for the