Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 135,285 pages of information and 216,189 images on early companies, their products and the people who designed and built them.
Martin's Cultivator Co of Stamford, Lincs.
Company founded by William Edward Martin
1911 Smithfield Club Show. Exhibited cultivators, a swath turner, rakes, horse hoes, harrows, potato diggers, mowers etc. 
1914 Exhibiting their two-stroke oil engine in 10, 20 and 25 hp models
1913-1917 For a list of the models and prices of Petrol Motor Commercial Vehicles see the 1917 Red Book
Built just one PSV chassis.
1920s The company built a fire engine.