ongoing issues with the introduction of the replacement Leyland. The last Matador was a 4x4 variant of the Mercury, introduced in 1960. Matador Mk.I, model 645 (1932–35) - 4x2 cabover version of Mercury Matador Mk.II, model 346/O346 (1935–47) - 4x2 cabover. Model 236/O246 (1935–40) was the normal-control version Matador Mk.II/III, model 853/O853 (1938–59) - 4x4 cabover (Mk.III from 1947) Matador Mk.III, model 3471 (1947–49) - 4x2 cabover. Renamed Mandator in 1949 Matador, model 4GM4 (1960–65) - 4x4 cabover (Mk.V cab, but marketed as "Matador Mk.II") The Matador name is often used for the 10-ton 6x6 military vehicles of Model 854/O854 (built 1940–44), but this model was never given an official name. It was an extended Matador chassis, mated to a Marshal double-drive bogie. Mercury The AEC Mercury (Model 440) was first built in 1928. This was a forward-control lorry with a wheelbase of for 4 ton payloads. The Model 640 was introduced in 1930, with a four-cylinder petrol engine developing 65 bhp. The name was resurrected for medium-duty 4x2 lorries and tractors built from the 1950s to the 1970s. Mercury, model 640 (1928–37) - 4x2 normal control Mercury, model G4M (1953–65) - 4x2 medium-duty cabover. The Mk.I (1953–55) usually had a Duramin cab, whereas the Mk.II (1955–65) usually had Park Royal cabs ('tin front' and later Mk.V cabs). Other cab manufacturers included Bowyers. In some export markets this model was sold as Monarch Mercury, model TGM4 (1964–77) - 4x2 medium duty cabover (Ergomatic tilting cab). In some export markets (notably New Zealand) this model was sold as a Monarch Militant The AEC Militant - or "Milly" - was the 1952 replacement for the Matador; a 6x4 or 6x6 artillery tractor/military lorry which continued in various forms until the 1970s. The Militant name had earlier been used by Maudslay in the 1930s. Militant Mk.I, models O859 and O860 (1952–66) - 6x4 and 6x6 cabover Militant Mk.II (1962, prototypes only) - 6x6 cabover (Park Royal Mk.V type cab) Militant Mk.III models O870 and O880 (1966–79) - 6x6 cabover. These were the last vehicles to use a variant of the AEC/Park Royal cab. Mogul The AEC Mogul model GM4 (1959–67) was a normal-control 4x2 built primarily for export markets. The Mogul name had originally been used on Maudslay lorries. Monarch The original AEC Monarch was built from 1931 to 1939 at AEC's Southall works. The first version had payload of 7 tons (increased