1970 Cook Islands Proof Dollar. Made from sterling silver. Weight: 26.9 grams. Please take a look at our other items for sale. The item “1970 Cook Islands One Dollar Coin Silver Proof New Zealand Rare H74″ is in sale since Tuesday, April 23, 2019. This item is in the category “Coins\Coins\World\Oceania/Australasia”. The seller is “theringman2009″ and is located in Morpeth. This item can be shipped worldwide.