Here are some pictures of when I first purchased her:
An easy way to tell is to check under the bonnet. Australian assembled vehicles have their engine bays painted black and are fitted with a fibreglass heater box.
New Zealand assembled vehicles had body coloured engine bays and metal heater boxes.
However, this isn't always accurate as it's easy to change those factors in the ensuing forty or so years since they were built. But it's a good guide.
The Holden model heirachy at the time was like this:
Belmont < Kingswood < Premier
Of course you had Ute, Wagon, Coupe (Monaro) and Sedan bodystyles.
There were three types of sedan bodystyle too: Sedan, Premier Sedan and Brougham.
The plain sedan is what you'd get if you ordered either a Belmont or Kingswood sedan.
The Premier sedan is the same as the above except it had different C pillars and the rear windscreen area, both the metalwork and the glass, were different (smaller squarer rear windscreen and more upright pillar, as opposed to the swoopy in comparison regular sedan body).
As my wagon is a lowly Belmont, it was very spartan.
She rolled off the assembly line with a 161 cubic inch six cylinder engine, three-speed column-change manual gearbox, 3.55:1 ratio non-LSD banjo differential and drum brakes front and rear. Might I mention that it had NO brake booster. It has seatbelts front and rear but I'm not sure if these were from new. Will have to check with Holden on that one.
Because the wagon has many non-original parts and is in no way a desirable model, I have decided to eventually convert it to V8. My goal is to create a V8 Belmont wagon as though it was a factory option in 1971. There will be subtle modifications incorporated, but the Soul of the car will remain.