This a long article in the latest issue of Motorcycle Classics (May/June 2016 Vol.11 No 5), but unfortunately at this point in time the on-line link below limits the reader to a single page of content.
http://www.motorcycleclassics.com/c...orcycles/john-player-norton-zmcz16mjzhur.aspx
http://www.motorcycleclassics.com/c...orcycles/john-player-norton-zmcz16mjzhur.aspx
