Duple concepts & prototypes
AEC Regal IV Duple Prototype UK-spec (C37C) '1950Produced in a single copy
![AEC Regal IV Duple Prototype [UK-spec] (C37C) '1950](https://s3.wheelsage.org/format/picture/picture-thumb-medium/a/aec/duple/regal_iv_prototype/aec_regal_iv_duple_prototype.avif "AEC Regal IV Duple Prototype [UK-spec] (C37C) '1950")
AEC Reliance 2U3RA Duple Continental UK-spec (C51F) '1962
![AEC Reliance 2U3RA Duple Continental [UK-spec] (C51F) '1962](https://s3.wheelsage.org/format/picture/picture-thumb-medium/a/aec/duple/reliance_2u3ra_continental/aec_reliance_2u3ra_duple_continental_5.avif "AEC Reliance 2U3RA Duple Continental [UK-spec] (C51F) '1962")
Leyland Tiger TRCTL11/3R Duple Laser Demonstrator UK-spec (C49F) '01.1983Produced in a single copy
![Leyland Tiger TRCTL11/3R Duple Laser Demonstrator [UK-spec] (C49F) '01.1983](https://s3.wheelsage.org/format/picture/picture-thumb-medium/d/duple/leyland/tiger_trctl11_3r_laser_demonstrator/leyland_tiger_trctl11_3r_duple_laser_demonstrator.avif "Leyland Tiger TRCTL11/3R Duple Laser Demonstrator [UK-spec] (C49F) '01.1983")
![Leyland Tiger TRCTL11/3R Duple Laser Demonstrator [UK-spec] (C49F) '01.1983](https://s3.wheelsage.org/format/picture/picture-thumb-medium/d/duple/leyland/tiger_trctl11_3r_laser_demonstrator/leyland_tiger_trctl11_3r_duple_laser_demonstrator_6.avif "Leyland Tiger TRCTL11/3R Duple Laser Demonstrator [UK-spec] (C49F) '01.1983")
WheelsAge.org '2005–pr.