Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 140,140 pages of information and 227,382 images on early companies, their products and the people who designed and built them.
Marles Steering Co of 64 Mortimer Street, London
1920 November. Exhibited at the Motor Car Show at Olympia and the White City with steering gear that uses cams and rockers
1924 Announced that it had concluded arrangements with the Adamant Engineering Co of Luton, for the firm to have exclusive rights as manufacturer and sales agent for the Marles steering gear for UK under licence. 
1951 The gear was used by the majority of vehicle manufacturers in the UK (around 60), especially medium and heavy vehicle manufacturers.