You are quite right.... and of course the NZGP was run prior to 1954 as well, although 1954 was when it became more of a feature / International race with the likes of Brabham Wharton Whitehead etc, and other overseas types, the event moving from Okahea to Ardmore.
1950 NZGP Okahea Programme cover.
I should have picked the error / misinformation myself, especially as a couple of days ago I was reading about the 1956 race with Moss bringing his Maserati over for the race. and along with a couple of Ferraris they got sent to Wellington instead of Auckland and a subsequent train transport from Wellington to Auckland delayed their arrival. I also read of the updates on Moss's car.... fancy alloy wheels and Dunlop discs instead of Mazza drums. Moss of course won from other Internationals by a large margin despite having to make a late stop for a minor fix. The Maserati stayed in NZ after Moss returned to Blighty, bought by a wealthy local.
But all in all I should have picked it.
Your eagle eyes saved the day.
All I can say is I copied the info straight from the NZ archives page I linked...."From records of the former Pukekohe Borough Council, held at Archives New Zealand Auckland Regional Office".
Being it is a Pukekohe Council record perhaps they are floating their boat a bit and made a bit more of it being the inaugural NZGP at the Pukekohe circuit.
Maybe they were thinking of it being the first NZ GP on a proper permanent road circuit..... given both Ardmore and Okahea were both more temporary Airfield racetracks ,indeed Airfields still used for planes.
In fact they are both still busy airfields for light aircraft use flight training to this day. Okahea is still used by the RNZAF and as an emergency diversion from Auckland Airport.
Im looking for a reason for their claim rather than an excuse for my oversight.
Having said that Ardmore is not a million miles from Pukekohe (20-30 klms), and closer to Auckland so after near enough 10 NZ GPs at Ardmore you would think they realised Pukekohe wasnt the first NZ GP. by a long shot.
Pukekohe did have the pleasure of hosing 2 NZGPs in 1984 (I think January and then mid December) although most sources dont reflect this referring to a 1985 race which never actually existed.
Anyway bottom line in relation to this thread is that the image is Pukekohe and was said to be taken in 1963 .