The Triple M series of MG’s all belong to a family of models that commenced with the 1929 MG Midget and continued through to the mid-thirties via a long string of four and six cylinder OHC engined cars that forged the marques identity.
JB 1646 was the factory demonstrator MG LI Magna and was launched in March 1933 at a cost of £299. The 1086 cc six-cylinder engine developed 41 BHP, enabling the car to reach a claimed 75 mph, according to contemporary reports. Like all Triple M cars, its 12″ brake drums were actuated by cables. Just 486 cars were built.