One of the most successful TT racers of the 1950′s and 1960′s, the Manx Norton dominated the 50cc and 350cc classes. This 350cc Model 40M features a “Featherbed” frame, and was raced in the 1957 Isle of Man TT by Norton Team rider, Bob Keeler. Keeler owned and raced this motorcycle as a privateer racer with factory support from Norton. The bike is now owned by Allan Grimm of Piedmont, California. Pictures after the jump.