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The Harper Runabout is a three-wheeled motor vehicle designed by Robert Harper. It was manufactured in Manchester, England, by A.V. Roe & Co. from 1921 until 1926, by which time about 500 Harpers had been produced.
References
Payne, Elvis (2013), The A–Z of Three-Wheelers: A Definitive Reference Guide, Nostalgia Road, p. 8, ISBN978-1-908347-16-9
Harper Runabout c. 1921