The collection has been arranged into 13 series to represent the development of the companies and the different media of the archival material. The series are: 1, World War I Royal Flying Corps staff cars and tenders; 2, Material on car and tractor production 1919-1936; 3, Photographs of public service vehicles built 1927-1956; 4, Records of chassis layouts, engines, gearboxes and electrically propelled vehicles from 1930; 5, Photographs of commercial vehicles built 1927-1936; 6, Photographs of vehicles and chassis details built from 1937; 7, Sales catalogues for internal combustion engines; 9, Part books for internal combustion engines; 10, Miscellaneous material; 11, Correspondence relating to purchase of The Sanderson Tractor & Implement Co. Ltd., Bedford in 1922; 12, Directors reports and statement.