5 oz Silver 25 th Anniversary of Kookaburra High Relief 201 5. Each coin's reverse depicts an adult kookaburra sitting on a tree stump surrounded by eucalyptus leaves and a fern. The design includes the inscription THE AUSTRALIAN KOOKABURRA, The Perth Mints special P25 mintmark, and the year-dates 1990 2015.The coins high relief reverse and obverse are minted on concave surfaces to ensure the optimum flow of metal is achieved by the strike of the die. Each coin is housed in a classic grey display case with a themed shipper and is also accompanied by a numbered Certificate of Authenticity. He Perth Mint will release no more than 500 in this packaging of the Australian Kookaburra 2015 5oz Silver Proof High Relief Coin, from a maximum mintage of 1,000. Composition: 99.9% pure silver Weight (g): 155.67. The item "$8 Dollar High Relief Australian Kookaburra 5 oz Silver Australia 2015 Proof" is in sale since Thursday, July 28, 2016. This item is in the category "Coins & Paper Money\Coins\ World\Australia & Oceania\Australia\Commemorative". The seller is "muenzdachs" and is located in Mainz. This item can be shipped worldwide.