Look harder. In 1973, Britain minted - * Two New Penny (Proof FDC) * One New Penny (Proof FDC) * One New Penny for general circulation * Half New Penny (Proof FDC) * Half New Penny for general circulation
An Australian 1956 Penny looks almost exactly the same as any other Australian Penny minted from 1955 to 1964 inclusive. A 1956 Penny minted in Perth will have a mintmark (.) after the "Y" in PENNY (Y.). The Melbourne Penny has no mintmark. See the 1964 penny at the link below.
It looks exactly the same as the 2010 or 2012 penny.
The US coin looks very much like a modern US penny
It is silver
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All British Pennies from 1982 to 2008 look pretty much the same as the Penny shown at the link below.
It looks exactly like the US cent.
There are pictures at the Related Link, below
Ugly.
An iris proof is a print from an iris printer that is a tool for the customer to see what the print job will look like.
The front of a 1917 penny looks very similar to a present day penny. The reverse had shafts of wheat with ONE CENT and THE UNITED STATES OF AMERICA.