Hi Cyberjack
I think you are right about an Amal contribution to the 'Victa' carburetor design - in one form or another.
For all we know, Victa may have commissioned another Aussie company to design a carby, and then that company had the Amal contribution.

It might have all changed when victa released their Imperial cylinder mower with the 2 stroke - maybe it meant they had more volume that made it viable to make G3 carbys without the governor vane.

Or maybe in 1972 they had some of the old style carburetors that they just wanted to get rid of. All very difficult to work out - but fun.

There is this link to another ODK thread - where there are edgers (including 1 withco) that have this old style carby.
I find the history of Victa really interesting - like all history; its all about putting different pieces of the puzzle together.

Regards
Tyler