Apart from occasionally taking one of my bikes for a spin, my father did most of his bike riding before I was born. In latter years he talked fondly of a couple of Vincents that he owned, a Black Knight and a Black Shadow and wished he still had them.
I recently came across this old photo of him with one of his bikes, but I don’t know which one it is and he’s no longer around to ask.
Does anyone recognise it ?

I recently came across this old photo of him with one of his bikes, but I don’t know which one it is and he’s no longer around to ask.
Does anyone recognise it ?
