Z1OwnersClub GB

Tricky one
Does anyone know if the UK Z1a had a triple ring Headlight or a single rim headlight held in with W clips.
The one that I removed had a single rim, the light glass was the original UK Koito type with the sidelight bulb.
The Koito light will fit both
Any help please ?

uk spec = single rim

Thank you
Next question
Does anyone have one in fair condition that they would be willing to sell me as mine is very poorly
I have now noticed that the UK Z650 also have the single rim.
They are slightly tappers so that the glass fits snugly against it, Part No Stanley 001-0877
Thanks