The first Silver Panda coins—issued 10 yuan Panda bullion in 1983, 1984, and 1985—were proof quality, with a precious metal content of 27 grams of 0.900 fine silver and a diameter of 38.6 mm. Mintages were only 10,000 for each year. No Silver Pandas were issued in 1986. The 1987 Silver Panda coins were minted in proof quality from 1 troy oz. of sterling (.925 fine) silver, with a diameter of 40 mm. There are several mints that produced Silver Panda coins over the years, including: Shanghai, Shenyang, and Shenzhen. Unlike coins made by US and German mints that carry mintmarks to distinguish their origin, Chinese mints generally do not carry mintmarks. In certain years there are minor variations in the coin design—such as the size of the date, and temple. That allows the originating mint to be determined. An example is 1996 where different mints produced coins with minor variations in the font size of the date on the obverse side of the coins. In 2015 the Gold and Silver Panda coins were not labeled with metal fineness and weight. This information returned in 2016 when the 1 troy ounce coin was replaced by the 30-gram coin (one troy ounce is approximately 31.1 grams)