Norton Twins : Owners Workshop Manual
117: Haynes Publications, 1974. 1st Edition. Softcover. Models covered: *497 cc, Model 7, 1949-1956 / 497 cc, Model 88, 1951-1963 / 597 cc, Model 99, 1956-1966 / *597 cc, Model 77, 1957-1959 / 497 cc, Model 88SS, 1961-1966 / 597 cc, Model 99SS, 1962-1966 / 647 cc, Sports Special, 1962-1968.....


