Great Britain, Silver Britannia (3), 2008, 2011, 2013. Uncirculated with some light hazing.Great Britain has issued popular silver bullion coins with the "Britannia" theme since 1997. Each coin contains one troy ounce of pure silver. The 2008 and 2011 coins are in "Britannia silver" of 95.8% purity and weigh 32.45 grams, each mintage was 100,000. The 2013 coin is issued in 99.9% silver and weighs 31.21 grams.