Hello Bart,
It's a wonderful image. Did you know that Nortons liked the picture enough to use it in their advertising in "The Motor Cycle" of 11th November 1943 ?
There is a higher resolution copy of the picture on the Canadian Archives site where you can see that the full census number is C4681040, making it a machine from contract C12426 - frames from W70001 - W76000 and a 1942 build date.
Rich.