The initial prototype TBU598G, registered in March 1969, carried a Pennine Coachcraft 41 seat dual-door body on the short-wheelbase version of the chassis and Seddon demonstrated it to a number of municipal and company fleets mainly in the Pennines, commencing its career in Halifax [REF].
By the end of 1970 a further 46 chassis had been built, bodied and delivered.