Northumbrian was a motorcycle produced between 1920 and 1921.
This marque appeared for a short time after the end of World War I. It was an obscure make that came from the North East of England, used a 3.5hp engine and was produced in small numbers.
Sources of Information
The British Motorcycle Directory - Over 1,100 Marques from 1888 - by Roy Bacon and Ken Hallworth. Pub: The Crowood Press 2004 ISBN 1 86126 674 X