Such a coin does not exist.
The Royal Australian Mint has never produced a Two Pence coin.
Value of an 2004 2 pence coin magnetic
Australia has never produced a coin valued at 8 anything (Pounds, Shillings, Pence, Dollars or cents).
The "face value" of a coin is whatever is inscribed on it, hence the term "face value". The face value of a 10 Pence coin is 10 Pence.
The value of the copper in a 2 Pence coin would be significantly less then 10% of the face value of the coin at the time the coin was minted. Today, it might be a little more, about 0.2 Pence.
Such a coin does not exist. The 10 pence coin was first issued in 1968.
There was no 1974 British 25 Pence coin minted.
There was no 1978 British 25 Pence coin minted.
Such a coin does not exist. The British 50 Pence coin was first issued in 1969.
Such a coin does not exist. The Irish 10 Pence coin was first issued in 1969.
The British 20 Pence coin was first released in 1982.
Most coin dealers should be able to sell you a 1936 Australian Penny.
There were no British 1975 25 Pence coins issued.