Wildlife and Conservation Day. On 15 November 1977. This limited edition cover No. 23 of 100 celebrates the discovery of the Atiu Swiftlet. , a unique bird species found only in the Cook Islands. Produced by Pacific Commemoratives Ltd. Rarotonga, this issue is part of the rare 1970s Cook Islands Philatelic-Numismatic Cover (PNC) program. Wildlife and Conservation Day / Atiu Swiftlet Bird. 50% Silver, 50% Copper. 27.97 g approx. 0.45 troy oz total weight. 13.99 g (? 0.45 × 0.50) = 0.45 × 0.925? 0.45? No?? 0.45 troy oz × 0.5 = 0.225 troy oz pure silver (7.0 g). Queen Elizabeth II (Arnold Machin portrait). “Swiftlet of Atiu in Flight, ” surrounded by fifteen stars representing the 15 Cook Islands design by James Berry, O. “RAROTONGA COOK ISLANDS, 15 NOV 1977 – First Day of Issue”. 100 covers only (extremely limited issue). 1977 was declared National Conservation and Wildlife Day in the Cook Islands, coinciding with the Bicentennial of Captain Cook’s discovery of Atiu. Was only recently described at the time, making this coin an early example of wildlife-themed numismatics highlighting new scientific discovery. The item pictured is authentic and is the item you will receive. Thank you and good luck. Any statement regarding grading and condition are subjective and represent our best opinion. Please make sure to take a close look at the pictures to judge for yourself. All coins and paper currency are stored in coin flips and/or semi-rigid bill holders. We do not end auctions early.