Hello SpudKiwi.
QUOTE “Thanks Minniehaha. I would still like to know if it is possible to see the original registers, wherever they may be. If I draw a blank with that, I will go armed with what I have.” Quote END
As I have yet to master adding a link to an Archives NZ search result page info, that I would like to draw your attention to, I’ve taken some page screen images, to which I have added some (Red ink) notations. I believe you are looking for 1918 registrations, so over 100 years ago, when a single entry, but not in a book register claiming to have year 1920 registrations.
(Past postings have seen my links take you only to the search box)
Two postings of images as they exceed the uploading limit.
Alan.