Good evening jimjamtwo,
The only 2d yellow "no watermark" variety in my 2006 SG New Zealand catalogue is SG432a, from the 1915-30 issue. The stamps should have a widely spaced W43 watermark, which sometimes misses the stamp completely. My catalogue has this as £75 mint, £150 used.
So yours looks like a nice find.

Hope this helps.
DavidR