Isle of Man TT race that year through Eric Williams, whilst also taking second, third, fourth and sixth place. The old Screw Company's facilities could not cope with the demand and with the company reconstituted as A.J. Stevens and Company (1914) Ltd, AJS moved to a new factory built around Graiseley House, in the Blakenhall district, a short distance south of the Retreat Street premises, which were relegated to the being the company's office and repair department. The 349 cc machine (known as the hp) was most in demand but the company also produced an 800 cc (6 hp) V-twin. On 3 November 1916, the Ministry of Munitions prohibited the production of non-military motorcycles, and AJS went over to manufacturing munitions, but in early 1917 the Ministry received an order from Russia for military vehicles, and AJS was given a contract to produce part of the order with its AJS Model D machine. This kept AJS busy until Ministry of Munitions restrictions were lifted in January 1919. When production of the 350 resumed in 1920, it was much improved. The side-valve engine was replaced by a new overhead-valve design that produced 10 bhp. It also had internal expanding brakes and chain primary drive. Cyril Williams won the first post war 1920 Isle of Man TT Junior race on his 350, even though he had to push the motorcycle home for almost four miles (mostly downhill) after a breakdown. AJS took the first four places in the 1921 Isle of Man TT, and Howard R Davies bettered his second place in the Junior by winning the Senior on the same 350 cc AJS. This was the first time a 350 had won the 500 cc Senior TT race. In 1922 Manxman Tom Sheard won the Junior on an AJS, with G Grinton, also on an AJS, taking second. The 1922 machine was a classic design that would become famous as the ‘Big Port’ on account of its large-diameter exhaust port and pipe (initially 1 inches, but changed in successive years). The OHV 350 would be the mainstay of the company's racing efforts until 1927 and in production form (first offered to the public in 1923), was also AJS's most popular sports motorcycle throughout the 1920s. At this time, the company produced a comprehensive range of other models ranging from 250 to 1,000 cc. These were generally given a model number, plus