I am not sure what you mean by "delaminated".
The New Zealand 5 cent coin was made from a copper-nickel alloy and was not plated with anything.
NOTE - All New Zealand 5 cent coins are no longer legal tender, but they are redeemable for face value at the Reserve Bank of New Zealand.
tiki
The NZ dollar is currently about 80c US. And there are 100 cents to the NZ dollar. But coinage is only usable generally in the country of issue. Banks will handle notes, but not generally coins.
the thickness isnt imprtant!
New Zealand withdrew its two cent coins from circulation in 1990; the smallest denomination coin in NZ is now the ten cent coin.
The old New Zealand 50 cent coin is approximately 31.75mm in diameter and 2.5mm thick.
The New Zealand 10 cent coin features a tuatara, a reptile endemic to New Zealand, on one side, and Queen Elizabeth II on the other side. The coin is made of copper-plated steel and has a smooth edge.
Canterbury of NZ Edward Reece coin
The name of Captain Cook's ship that he sailed on to New Zealand is the HMS Endeavour. It is depicted on the 50-cent coin in New Zealand.
The value of NZ coins varies widely, and you will find a book listing these at most coin and stamp dealers.
NOTE - All New Zealand pre-2006 50 cent coins are no longer legal tender, but they are redeemable for face value at the Reserve Bank of New Zealand. The newer coins are potentially still in circulation so, unless they are part of a Proof or Uncirculated mint set or are individual Proof or Uncirculated coins and in absolute mint condition, they are worth 50 cents.
NZ didn't have cents in 1933
On the NZ two dollar coin the animal is a white heron