In order to receive an appropriate advice from somebody knowledgeable in New Zealand coinage you should first make an effort and provide sharp and higher definition pictures of you coin, at least of this quality.

Don't forget to cut away the empty spaces around the coin on your pictures, so that the files are not too big to upload to Numista.
I collect coins and tokens which circulated in Africa from 18th century to 2000. I sell about 7000 illustrated world coins from
http://www.avscoins.com.