Mark D - May 1956 to November 1958
The Mark D had an identical body style to the later Mark C, with a Standard/Deluxe 2/3 seater Tourer and a Standard/Deluxe 4 seater Family Safety model available. They used the new Villiers 9E, 197cc engine with a 3 speed direct change gearbox, 4 plate clutch and a heavier drive chain. All models featured a 12 volt electrical system, separate sidelights incorporated into the headlamps, chrome headlamp hoods, front wing side flashes and a grab handle on the dash. Deluxe vehicles had engines with a Siba Dynastart and bumpers were fitted front and rear. Like the Family Safety models, Tourers also now had the same rear apron fitted between the body and the bumper. Any model could be specified with a glass fibre hard top.
All Family Safety models were fitted with a 4 speed gearbox and were then designated "Family Tourer".
The "Family Four" had a hard top similar to the Mark E/F and was first shown at the 1958 Motorcycle Show at Earls Court. Priced at £339 10s 6d (£339.52½p), only one was ever made and it also became the last Mark D. The registration number was MCK 509.
Chassis Number Range: H/5/11797 to J/10/15570