262
The 12 cm thick coin has a face value of $648 million and is still legal tender.
In 2012, it ended up in the Guinness Book of World Records. It was even sent on tour to various countries in Asia and Europe, and in 2019 it was delivered to New York for a day. The purpose of the action was to PR the gold used by the Perth Mint, as the latter is traded on the exchange as part of the Perth Mint Physical Gold fund.