Ventura spoke about his latest bike..

The records show its a Sept '71 bike which went to the States in Jan '72, returning to UK in 2008.

I would have thought it would conform more to a 1972 model in that case. To me I would be going by the dates, the black frame, seat pattern and fork sliders. I would not hesitate to be labelling it as a 72 bike.
I am sure others here will have thoughts.
Oh, the mufflers of course...

Looks nice. Well done.