H706725 isn't a very early HQ. It was completed on 14/10/71. It's a bog standard HQ V8 Belmont sedan. Absolutely no mechanical options. It says warranty commenced 10/71 but I think all Trentham destined cars back then showed the same thing ie warranty started in the same month as completion - they must have had another system for the NZ sold new cars.

The first Pagewood production HQ PSN was H682602 completed 1/6/71 however being a Pagewood build that doesn't mean it was the first one as there are heaps of later PSN's completed back in May 1971, dozens of them. Out of interest H682602 had engine number QD1224. There are cars with Qx10xx numbers there too, I think QR1021 (actually will show up as 11QR1021 as it was in a Statesman) is the earliest one recorded in a Pagewood car.