25.00g (0.80oz). Available by beginning of May 2015. The blue nawab or Polyura schreiber is a butterfly which is mainly found in Singapore but also in other tropical areas in Asia. The colourful insect stands out with its eye catching pattern and a wingspan of up to 115 mm. The green caterpillars are particularly remarkable. They weave a silk resting place on a few leaves of the plant they inhabit. This is where they rest during the day, in order to recover from their nightly feasting tours. Partially gilded and colored. Successor to the popular Bee coin. Low mintage – limited to only 2,000 pieces. Comes with capsule, certificate of authenticity and a special presentation case. We strive for excellent service. Though we normally reply to inquiries as soon as possible, please note that our office is limited on weekends and holidays. Track Page Views With. Auctiva’s FREE Counter. The item “Cook Islands 2015 $5 Shades of Nature Butterfly 25g Silver Proof Coin” is in sale since Friday, March 06, 2015. This item is in the category “Coins & Paper Money\Coins\ World\Australia & Oceania\South Pacific”. The seller is “jvpic” and is located in Berlin. This item can be shipped worldwide.