I had a look at the Perth Mint site & ended up totally frustrated! About as much use as tits on a bull!
You could try this site: http://www.coincity.com.au/catalog/index.php?cPath=25_38
Like most mints I know they are no longer intrested in coins or bars that are sold out
You can only get information on the items they have for sale
I spend one hour on the Perth Mint site and the site is useless
The only mint I know that gives information is the Canadian Mint
I will look up your link tomorrow
Thank you for taking the trouble
August