wheelbase three-axle double deck trolleybus chassis manufactured by AEC between 1933 and 1942 and designated for installation of up to 74 passengers' rear- or central-entrance 30 ft. (length) x 7 ft. 6 in.

Based on the AEC Renown bus chassis, 796 were built for British operators including 660 for the London Passenger Transport Board for whom it was primarily developed.

[1] An ″Overseas″ significantly revised variation of this chassis with left-hand steering was also developed to accommodate a single-deck 32 ft. (length) x 8 ft. 3 in.

(width) body for seating up to 40 passengers with front entrance and central exit.

Several chassis of this 664T Overseas type were supplied for service in Montreal, becoming the first trolleybuses put into operation in Canada.