Rob, sorry for the slow reply just been real busy.
I’m guessing the Major in the Mulheim picture is Norman Joseph Levien whom I mentioned in post #28, sadly he is not wearing service stripes to confirm his long service, but how many Majors in the NZEF NZAOC in 1919 were there?
I still believe Major Levien would have been a key player behind the adoption of the NZEF Ordnance badges.
The following badges are from my own collection, the NZEF Ordnance collar badges took me a long time to find and by comparison the short lived Home Service NZAOC collar badges are much more common.
The few NZEF NZAOC collar badges that I have seen do not have the Gaunt tab and am curious if anyone has an example of a Gaunt made NZEF NZAOC collar badge they can share?