Martinshaw were motorcycles produced from 1923 to 1925, in Twickenham, Middlesex.
- 1923 The company started with an ambitious range, all fitted with Blackburne engines, stretching from the 348cc sv single to the 998cc V-twin.
- 1924 The range had shrunk to the 348cc sv model and the similar 545cc sv. Both had Sturmey-Archer gearboxes and all-chain drive.
- 1925 The two models continued . Moss gearboxes were standardized and a couple of ohv models were tried. One had a 348cc Blackburne, the other a 349cc oil-cooled Bradshaw. It was their last year.
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