Cook Islands 2012 Year of the Dragon 4 x 1/2 Oz Silver Proof Coin Set. 4x 1/2oz (62.20g total). 70.00 mm (extern ring). 30.00 mm (intern ring). Fascinating four coin set depicting Chinese dragons on the reverse. All four coins are fan-shaped and form a ring, when put together. All four coins are housed in one ring-shaped capsule and presented in a prestigious presentation case. Very low mintage – limited to only 5,000 sets. Comes with capsule, certificate of authenticity and a high-quality wooden 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 2012 Year of the Dragon 4 x 1/2 Oz Silver Proof Coin Set” is in sale since Thursday, March 26, 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.