Re: C5 (Scott) - Trans-Tasman first flight cover
I have moved this posting into the main board.
The first day of issue of the trans-Tasman airmail stamp was 17th January 1934 and covers posted on that date are surprisingly rare. Covers to be sent on the trans-Tasman airmail were postmarked as normal in the place that they were posted and sent to Auckland where they were postmarked again on 17th February and the special cachet added.
The cover you are looking at was therefore postmarked on the second day of issue.
Hope this helps.