UPDATE emailed to me from the Perth Mint...

Official movie coins celebrating Transformers: Dark of the Moon have been released by The Perth Mint.

Each coin is struck from 99.9% pure silver. The coloured coin designs portray Bumblebee, Optimus Prime and Megatron. Just 5,000 of each design will be released worldwide accompanied by a numbered Certificate of Authenticity. Coins are available individually or as a Transformers Trio. Check out www.perthmint.com.au/transformers