I've got tired of chasing them all over the place,and when I've found this at an Australian dealer,i immediately bought it.They have no idea if this is something that the
Perth Mint did,or it was something custom.( I guess the Mint issued it,because of the Certificate).
Maybe some of our more knowledgeable aussie friends know if this was a normal Mint Issue at one point in time.The plastic cases on all(except that 2004),are made specifically with a flat upper lip to rest on the moulded hole.