A coin such as you have described would have to be seen before an accurate value could be given. I would suggest you take the coin to a coin dealer and have it appraised.
The last Australian Penny was minted in 1964.
A Buffalo Nickel stamped on a penny is worth $800.00. A Jefferson Nickel stamped on a ZN penny is worth $70.00. A Jefferson Nickel stamped on a CU penny is worth $60.00.
There was no 1939 Eire (Irish) Penny minted.
The last Australian Penny was minted in 1964.
The last Australian Penny was minted in 1964.
There is no such thing as an Indian head nickel minted in 1895. The first Indian head nickel was minted in 1913; prior to that was the Barber nickel, with the head of Liberty.
There is no such thing as an 1889 Buffalo Nickel. Buffalo nickels were only minted from 1913 to 1938. A nickel minted in 1889 would be a Liberty Head or "V" nickel.
No such coin exists, the wheat penny was minted from 1909-1958.
There was no 1850 British Penny minted.
size and value
There is no record of a British 1852 Penny having been minted.
Such a coin does not exist. The first Australian Penny was minted in 1911.