-JdK- Contributed by Howard. Roger suggests it's a 1907 model as it is virtually identical to Rem Fowler's TT machine. Also, the registration is mid 1907.
-SG- Fowler's bike had (and I stress had as I am sure it no longer exists!) a chain driven magneto and this one has a shaft driven magneto ... so not the same! I am advised by Mike in Wales, who does know a lot about Norton products from pre 1914, that the shaft driven magneto machines date from 1908. I realise this may be contrary to what the registration mark O2833 tells us but ... perhaps the engine had been changed.