Cook Islands - Endangered World Wildlife - Peregrine Falcon - $50 - 1990 - Proof - KM-357 - This beautiful proof silver crown was minted by authority of the government of the Cook Islands, and has a legal tender value of $50 (New Zealand), which is equivalent to 33 United States Dollars at current exchange rates. There were 24 coins produced in this series which were minted from 19 to 20 grams of .925 silver as part of The Fund For Endangered Wildlife series of coins dated between 1990 and 1991. The value of the coins in the secondary market fluctuates based on the wildlife depicted on the coin, because some species tend to be collected more avidly than others. My personal belief is that as more collectors discover these stunning wildlife world coins, their value will continue to increase dramatically.