Nothing. Modified coins have no collector value.
The last Australian Penny was minted in 1964.
The last Australian Penny was minted in 1964.
The last Australian Penny was minted in 1964.
The last Australian Penny was minted in 1964.
Such a coin does not exist. The first Australian Penny was minted in 1911.
The last Australian Penny was minted in 1964. Their place in the Australian currency was replaced by the 1 cent coin in 1966.
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.
The Australian Penny was issued in most years from 1911 to 1964 inclusive. Depending on their condition, the year they were minted, where they were minted, and any peculiarities of the coin, they could be worth anything from 50 cents to thousands of Dollars.
There was no 1970 Papal Visit coin issued in Australia.
With the possible exception of traders tokens (with the traders business name on them), there were no "Australian" pennies minted prior to 1911.
With the possible exception of traders tokens (with the traders business name on them), there were no "Australian" pennies minted prior to 1911.
With the possible exception of traders tokens (with the traders business name on them), there were no "Australian" pennies minted prior to 1911.