letter to denote the year of manufacture (for example, B meant 1924, F 1925, G 1926). In 1929 for example, the AJS range consisted of: M1 Deluxe 996 cc side-valve V-twin £76/10/0; M2 Standard 996 cc side-valve V-twin £66/0/0; M3 Deluxe Touring 349 cc side-valve single £48/10/0; M4 Deluxe Sporting 349 cc side-valve single £48/10/0; M5 Standard Sporting 349 cc side-valve single £45/0/0; M6 349 cc overhead-valve single £54/10/0 (twin port), £52/0/0 (single port); MR6 Special Sports 349 cc overhead-valve single £62/0/0; M7 349 cc overhead-camshaft single £62/0/0; M8 498 cc overhead-valve single £62/0/0 (twin port), £59/10/0 (single port); MR8 Special Sports 498 cc overhead-valve single £72/0/0; M9 Deluxe Touring 498 cc side-valve £54/0/0; M10 498 cc overhead-camshaft single £72/0/0; M12 Lightweight 248 cc side-valve single £39/17/6. Several of these were intended to pull one of the 12 AJS sidecars also on offer, including sports, touring and commercial models. By 1927, it had become clear that push-rod overhead-valve designs were becoming dated in racing, so AJS introduced two new chain-driven overhead-camshaft racing models, the 349 cc K7 and the 498 cc K10. Jimmy Simpson rode a 350 to third place in the Junior TT and won races in Europe but in 1928 AJS used the overhead-valve engine in the TT. In 1929 there were again two machines with an overhead cam, this time the 349 cc M7 and the 498 cc M10. Wal Handley came second in the 1929 Junior TT for AJS. The following year Jimmie Guthrie won the 1930 Lightweight TT on a 250 cc AJS. The R7,350 ohc, won 8 of the 9 Grand Prix and established at Montlhery, near Paris, a number of world records, including 1 hour at an average of 104.5 miles per hour and 2 hours at an average of 99.5 In 1931, the AJS S3 V-twin was released, a 496 cc transverse V-twin tourer with shaft primary drive and alloy cylinder heads. It had been expensive to develop and was slow to sell. Even though it held 117 world records, the AJS company was now in financial trouble. The 1935 film No Limit was set at the Isle of Man TT. The film starred George Formby as an aspiring racer who travels to the Isle of Man with his modified and streamlined 1928 "Rainbow" motorcycle, which he has christened a Shuttleworth Snap, in order to compete at the races. In the film