Thierry in France
"Thierry: he number on the base of the barrel is 60xxx; there is no number on the crankcase, which may have been replaced at some time. The number on the barrel belongs to a 596cc Model 30, shipped on 8 November 1934 to a Geneva dealer "Demont", with an optional dynamo (Bosch) and a speedo. The frame number could have been 55xxx but unfortunately the page that contains my Norton's details is messy and the numbers are unclear. The engine has some interesting racing parts fitted: a full bronze head, magnesium cambox and the central oil feed through the camshaft to the cambox."