let me see..
There was a full fleet of Cs in Melbourne Australia in the 60s & 70s.. Miss Nylex sailed against at least 6 on a weekly basis when she was launched.. This was at the tail end of the Cs down under..


I recall seeing Quest 1, 2, 3 Miss Nylex, wildcat and that 20 footer that had the bit added to make her a C not a B.. all being rigged..

Definitely there were worlds.. The mast of the "Siska" C stood for years at Neddies as the flag pole.. The picture of "Rolly" winning the worlds was on the walls.. So there was a fleet in Perth at some stage..
Im also certain Bruce Proctor won the worlds in Darwin.. Could have been on a "Quest" prior to wing masts.