That was his early 952 prototype with the shift shaft behind/below the primary.
It had gear drived cam also, and the oil pump was inside the crankcase.
But I never liked the blackout finish on the motor.
The covers and cooling fins were reshaped on the 961 to make it look more "classic Norton" like.
Here is a photo of a later 952 prototype with new crankcases and dual shocks.
You can see the rough cut of the engine covers and cooling fins. It's not quite there yet in terms of style.
But on the right track for sure. Mags are a nice touch too.