The 'Colonial' spec related to the Model 16'C' in the 1920s. It seems to have disappeared with the last of the flat-tankers. There was no 16C in the post-1932 Edgar Franks range.
Yep, a grey Norton with a crankcase shield, a solar topee and breeches...I like the sound of that pose !
Thanks Rik, I thought it might be for earlier bikes
A 1935 Model 19 would have the open valve engine with parallel pushrods, lovely if you can find one
Many thanks for your respond and comments. It comes to conclude that the frame is not WD frame.
I am very far away from all you experience about Norton bike. Nice group here..