This WWF 50th anniversary collection set comes with an official certificate in a 3-coin collection case and is limited to only 1,000 sets worldwide. The commemorative 50th anniversary silver coin had a limited mintage of 30,000 as well. All three coins were minted by Shenzhen Guobao Mint. The hinges on the case are broken. 
 
Collection Set Certificate # - 0769
Commemorative 50th Anniversary Silver Coin Certificate # - 21769
 
The Silver WWF Coin
Date: 2011
Denomination: 10 Yuan
Weight: 31.1 grams
Composition: 1oz .999 Silver
Diameter: 40mm
Obverse: Features the title of PRC, the year date (2011), and depicts the People's Republic of China Coat of Arms.
Reverse: Features two Tibetan antelopes in the foreground, with a bounding herd and a snow-covered mountain in the background. The words "WWF" in English, "The 50th Anniversary of the World Wide Fund for Nature" and " Tibetan antelope" in Chinese as well as the face value. 
 
The Silver Jubilee Medal
Date: 2011
Weight: 31.1 grams
Compositon: 1oz .999 Silver
Diameter: 40 mm
Obverse: Depicts tree leaves integrating animals in wild, symbolizing the beauty of evolution and nature. 
Reverse: Features a panda embracing the earth, meaning the harmony of life and nature. 
 
The Silver Panda Coin
Date: 2011
Denomination: 10 Yuan
Weight: 31.1 grams
Composition: 1oz .999 Silver
Diameter: 40 mm 
Obverse: The Temple of Heaven as well the title of PRC and the year date (2011) is displayed.
Reverse: A panda with its baby is featured with the face value.