What is the value of an Australian penny 1012?
Such a coin does not exist. The first Australian Penny was minted in 1911.
No general circulation Australian Penny was ever minted in silver. If you have an Australian 1911 silver Penny, it is because somebody plated it, and it is subsequently worthless as a collectible coin. There were a few silver Pennies minted in later years, but they were minted as a trial and never released.