When decimal currency was introduced in New Zealand on 10 July 1967, there was no new circulating denomination with the size and specifications of the old one crown piece, in which only commemorative coins had been issued; the new (large) fifty cents were equivalent in value but not in size. New Zealand issued crown-sized commemoratives with the specifications of the old crown, based on the British pre-decimal Crown. Until the introduction of the smaller circulating dollar coin in 1990, these coins had a one dollar denomination; later issues were denominated as five dollars.
The format changed to one troy ounce of silver in 2009.
These coins are legal tender but are not intended for circulation. | 
