1 oz Gold Bars. Proof & Mint Sets. 1990 China 3-Coin Platinum Panda Proof Set (w/box & COA). Photos in this listing may or may not be stock photos. The photos are meant to be an indication of the product you will receive. Contains 0.85 oz of. Coins come in capsules within a wooden case with a certificate of authenticity. Mintage of 2,500 sets. Obverse: Depicts the Hall of Prayer for Abundant Harvests in the Temple of Heaven in Beijing encircled by the phrase People’s Republic of China in Chinese closed off by the year of issue, 1990. Reverse: Three different designs used only for this set. Issued by the Shenyang mint. This set would make a nice addition to any type of Panda collection. Add this truly unique set to your cart today! This is not a photo of the actual item.