A.J.S. (A. J. Stevens & Co. Ltd.) was a historic British company, founded in 1909 in Wolverhampton by Albert John Stevens. Initially specializing in the production of motorcycles, the company stood out for its technical innovation and the quality of its construction. During the 1910s and 1920s, A.J.S. developed both road and racing models, earning an international reputation in motorcycle racing thanks to numerous victories and records. In the 1930s, the company faced economic difficulties related to the Great Depression and growing competition, leading to periodic changes in ownership and collaborations with other British motorcycle manufacturers. During the Second World War, production focused on military vehicles, but after the conflict A.J.S. resumed its civilian and racing activities. Despite the quality of its products, the company struggled to maintain competitiveness in the emerging market for lightweight, low-cost motorcycles, and in the late 1950s it was absorbed by Associated Motor Cycles (AMC), with production of A.J.S. motorcycles continuing until the 1960s. Today, A.J.S. is remembered as one of the icons of classic British motorcycling, prized by collectors for the refined engineering and distinctive design of its historic models.