Rob, They don't say in the series, they just suddenly appear in one of the later episodes. One of the wounded NZ soldiers asks a NZ nurse why she doesn't have a pin like the other nurses, and she says because I a New Zealander. Then he says why don't you have one of the NZ pins then. (or basically to that effect) And, shortly after she obtains one.
I highly recommend the series as it is excellent. And even more so as the story line is taken from personal accounts and they show the real nurses at the end of the last episode. I've already watched it twice and may go for a third shortly it is that good. Certainly makes you appreciate what the nurses had to put up with and do.
Terry
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