What is the value of a 1966 New Zealand Halfpenny?
Such a coin does not exist. The last New Zealand Halfpenny was issued in 1965.
A New Zealand 1940 bronze Halfpenny (George V), uncirculated and in absolute mint condition could fetch up to $75 NZD. If it has been circulated but still in good condition, it might fetch anything from $2 to $20 NZD. There were 3.432 million minted. A reputable coin dealer will be able to give a more accurate valuation. NOTE - 1940 was the first year of issue of the New Zealand Halfpenny.