There were seven prototypes made (R650, 651, 652, 797, 810, 811, 979) There were however, only 130 production Rickman’s originally made. Production went from April 1970 until January 1972. Frame numbers commenced at R1001 and ran through to R1130.” Launching a parallel twin sports bike in 1971, powered by an engine with its origins stretching back to the 1950s, at a time when the motorcycling world was going gaga over the new Japanese multis, and to a certain extent, the British triples, would seem in hindsight to be sheer folly. Yet this is what the Rickman Brothers, Don and Derek, did with their new Rickman Interceptor – a marriage of the superb Rickman chassis and the venerable twin cylinder OHV Royal Enfield powerplant. Selling with California title and NO RESERVE!