My guess is that most NZ badge collectors on this forum know the answer to the question, as it is mentioned on page 79 (#12/64) of Geoff Oldham’s 1997 badge price guide.
“NZMGS” = “New Zealand Machine Gun Section.”
Unfortunately not everybody has Geoff’s book, which has led to some confusion as to what the “S” in NZMGS stands for.
I know one person who thinks that the “S” stands for “Specialists,” and he has met others who suggest that it stands for “Signallers.”
Another person suggests that it represents “Squadron.”
Admittedly, both Geoff and Dave Corbett’s badge books contain some mistakes, but the few paragraphs that relate to the NZMGS and Specialist Company are in my opinion correct.
Worthy of debate???? I think so, and am only too happy to play Devil’s advocate representing the “New Zealand Machine Gun Section.”