The New Zealand 1 and 2 cent coins were progressively withdrawn from circulation from 1988 and demonetised in 1990. 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 have little or no collector value.
The Reserve Bank of New Zealand will pay face value for legally issued New Zealand currency. See the link below.
The first New Zealand 1 cent coin was issued in 1967.
Such a coin does not exist. The New Zealand 1 cent coin was first issued in 1967.
Such a coin does not exist. The New Zealand 10 cent coin was first issued in 1967.
New Zealand introduced decimal currency in 1967 and have never produced a half cent coin.
New Zealand 20 cent coins have never been minted in gold.
Such a coin does not exist. The Tuatara was featured on the reverse of the New Zealand 5 cent coin which was withdrawn from circulation and demonetised in 2006.
The New Zealand 1 cent coin was only issued as a bronze coin. If you have one that appears to be silver, it is because somebody plated it. Modified coins have no collector value.
It is a 5 cent coin. 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.
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.
NOTE - All New Zealand pre-2006 20 cent coins are no longer legal tender, but they are redeemable for face value at the Reserve Bank of New Zealand. The New Zealand 1970 cupro-nickel 20 cent coin (Elizabeth II) was only ever issued as part of an Uncirculated coin set. A reputable coin dealer will be able to give a more accurate valuation.
There is no New Zealand 30 cent coin.
A New Zealand 1998 5 cent coin, uncirculated and in absolute mint condition could fetch up to $2 NZD. There were 8 million minted. A reputable coin dealer will be able to give a more accurate valuation. 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.