Norton singles: Manx and Inter, and all side and overhead valve singles from 1927 to 1966 (Osprey collector's library): Roy Hunt Bacon: 9780850454857: Amazon.com: Books
Norton ES2 1934 | Pure Sound & Start Up by Jaume Soler - YouTube
Norton ES2 - Wikipedia
File:Norton ES2 1939.jpg - Wikimedia Commons
Norton ES2, 500 cc (1929) * All PYRENEES · France, Spain, Andorra