It is the rarest New Zealand circulation coin known, struck with both New Zealand and UK designs, now formally authenticated by Numismatic Guaranty Company (NGC), the world's leading third-party authority on mint errors, as Mint Error - Genuine.    NGC: A Mule is a coin that has an obverse and...

Only 3 Others Known? The Ultra-Rare 1940 NZ Coin Set Another remarkable rarity from Aventine Coins & Bullion — with only two others known and seldom seen on the market, even among New Zealand's coin dealers and collectors.   A Presentation Set In 1940, New Zealand marked the 100th anniversary...

To believe that such an unrivalled rarity survived is almost beyond imagination.   Perhaps it may even be the long-lost 1930 Australian Penny's reverse die?   Ultimately, the actual first in numismatics isn't the first strike of a circulation example or even a presentation specimen — it is the original...