The * (star) does not mean that you won the coin, but that the chance exists since your bid was equal or higher than the published hammer (hence also the grey color, instead of green). If you scroll down the page, you will find the following note: * Please note: This bid has been executed for you by the auction house. If you would like to know whether your bid was successful, please contact the auction house. The reason is simply that auction houses that use their own bidding systems don't share the bidder number or name of the person who won the lot.