The AEC 661T was a two-axle double deck

trolleybus A trolleybus (also known as trolley bus, trolley coach, trackless trolley, trackless tramin the 1910s and 1920sJoyce, J.; King, J. S.; and Newman, A. G. (1986). ''British Trolleybus Systems'', pp. 9, 12. London: Ian Allan Publishing. .or troll ...

chassis manufactured by AEC between 1931 and 1942. Based on the AEC Regent bus chassis, 330 were built for United Kingdom operators. The first four of these were supplied to Southend Corporation. Bodywork on early models was similar to that on the AEC Regent motor bus, but a full-fronted version was used from 1934.

References

661 Trolleybuses Vehicles introduced in 1931 {{Bus-stub