Cook Islands – 1973 Official Sterling Silver Proof Coin Set – KM# PS4. The commemorative Proof Set comprises two (2) Sterling Silver crowns: 2-1/2 Dollars (KM#9 – Captain James Cook’s 2nd Pacific Voyage), and 7-1/2 Dollars (KM# 10 – 200th Anniversary of the Discovery of the Hervey Islands). Coins were struck and packaged at The Royal Australian Mint (RAM) under authorization of the Government of Cook Islands. They come inside original horizontal brown hard plastic case. 925 Sterling Silver and weigh 27.5 and 33.8 grams respectively. This makes just a total bullion content of the set is nearly Two Ounces (exactly, 1.8185 Ounces) of pure Silver. Please look at the pictures – just a beautiful set of Proof Silver coins. And it could be yours! All items listed as a “fixed price” or “best offer” or “good until canceled” are subject to prior sale in our retail coin store, so please consider purchasing or making an offer on these listings fairly quickly if they are of interest to you. We would never know if you wanted the item, if you didn’t make offer..