Official RAM reverse die for AC/DC Back in Black 20c, in official round perspex display case with example of the struck coin in capsule. From the RAM website: 'To celebrate this coin release and the anniversaries of the six AC/DC albums, the Mint is offering never-before-released production coin dies to fourteen lucky fans who purchase any of the AC/DC coins from the Mint, one of its authorised dealers or select music shops. The production coin dies on offer were used to strike the AC/DC coin � a rare and unique opportunity. To be eligible to win a production die, participants will also need to visit the Mint's Facebook page and post what the name of their AC/DC cover band would be and where they purchased the coin.' This production die was won by one the lucky winners, there are only 13 others in existence, a rare opportunity to win a piece of Australia's coin striking history.