Cat coin.
This is the smallest, cheapest platinum coin I could find: 1/25th of an ounce and with a rather pretty cat on it. It was issued by the Isle of Man. Source:eBay seller directcoin Contributor:Theodore Gray Acquired:10 July, 2003 Text Updated:11 August, 2007 Price: $49 Size: 1/2" Purity: 99.95% Sample Group:Coins
