In my opinion this Duplex Goldstar BSA is the real deal when it comes to an Aussie classic Dirttracker.
Although I admire all the Mettise's, Rickman's, Cheney's and all the US Flattrackers, this old girl is a prime example of what an Aussie Short Circuit bike was from around that era.
Personally I have no recolection of any of those other frames being pedalled around seriously on our tracks, other people with more knowledge than me may have a different opinion.
The Goldie pretty much ruled the roost until the Hagon invasion.
Anyone thinking of building a true Aussie pre 60 - 65 Dirttracker, this is what you should be aiming at.