Bill O'Brien 'Amazon' Class Catamarans

[Bobcat]

I have a 1975 Bill O'Brien 8m/26ft 'Amazon' Class catamaran originally called "Sophisticat" but now "Zamani" and I am trying to find out more about her history and would love to know her sail/build number etc and confirm the correct class insignia for a new mainsail in due course.

The class precursor was the short lived Channel Rover and I suspect that the Clover Leaf (Rover = Clover rhymes) was retained for the 8m/26ft Amazon but the later 28ft Amazon insignia was based on the letter 'A'. Grateful if anyone could confirm this and the possible Build/Sail Number of my boat.

Any other information on this class of catamaran and my particular boat would be very much appreciated. Many thanks.