COOK ISLANDS, Official Opening by Her Majesty Queen Elizabeth II of Rarotonga International Airport, 1974, in oxidised silver and another in gilt silver (each 63.5mm; 200g) (K.83), by James Berry, struck by Royal Australian Mint, obverse, head of James Cook left, reverse, crown and Royal cipher above 10-lines of commemorative text. With issue card, only 20 sets issued, extremely fine and scarce. (2)