The same process occurs today with the copper content of coins such as the pre-1997 Canadian penny , the pre-1982 United States penny and the pre-1992 UK copper pennies and two pence .
The same process happens now with the copper content of coins such as the pre-1997 Canadian penny ( one cent ) , the pre-1982 United States penny and the pre-1992 UK copper pennies and two pence .