I've been interested in numismatics, mints that have some bragging rights for instance world's largest gold coin, world's first platinum circulating coin, world's first bi-metal, tri-metal etc. Here's some of my thoughts: World's largest gold coin record trend: http://lunaticg.blogspot.com.au/2011/11/worlds-biggest-gold-coin.html World's first platinum coin was officially struck for circulation - Russia 1828 3 ruble World's first tantalum (bimetal + silver) coin - Kazakhstan 2006 500 tenge World's first antimony coin - China 1931 Kweichow 10 cash World's first palladium coin - Sierra Leone 1966, set of 3 coins World's first titanium coin - Gibraltar 1999 5 pounds And so on. List can also be the world's most expensive coin of it's catagory. Would like to see interesting records.
To 2008, 46 million onces of gold have been sold through the South African Krugerrand. A record for bullion coinage.
