<P> The rare 1936 dot cent is as notable in Canadian numismatics as the 50 ¢ piece of 1921 . There were four minted specimens of this coin, produced with the dot to show they were made in 1937 while the mint was waiting for new dies due to a delay caused by the abdication of King Edward VIII and the need to create new dies for his successor, George VI . The last one sold at Heritage Auctions in January 2010 for over US $400,000 (this does not include taxes). It was graded specimen 66 by the Professional Coin Grading Service . Three known examples are in private collections, making it one of the few coins lacking in the Ottawa Currency Museum . </P> <P> In contrast to the 1936 issues, the 1948 cents dated 1947 and specially marked are very common . These 1947 Maple Leaf coins were made while the dies were being changed to show George VI was no longer Emperor of India, as the title of "Emperor of India" was dropped from the titles of the Crown per article 7.2 of the Parliament of the United Kingdom's Indian Independence Act 1947 . </P> <Table> <Tr> <Th> Years </Th> <Th> Mass </Th> <Th> Diameter / Shape </Th> <Th> Composition </Th> </Tr> <Tr> <Td> 2000--2012 * </Td> <Td> 2.35 g </Td> <Td> 19.05 mm (​ ⁄ inch), round </Td> <Td> 94% steel, 1.5% nickel, 4.5% copper plating </Td> </Tr> <Tr> <Td> 1997--1999 * </Td> <Td> 2.25 g </Td> <Td> 19.05 mm (​ ⁄ inch), round </Td> <Td> 98.4% zinc, 1.6% copper plating </Td> </Tr> <Tr> <Td> 1982--1996 </Td> <Td> 2.5 g </Td> <Td> 19.05 mm (​ ⁄ inch), 12 - sided </Td> <Td> 98% copper, 1.75% tin, 0.25% zinc </Td> </Tr> <Tr> <Td> 1980--1981 </Td> <Td> 2.8 g </Td> <Td> 19.05 mm (​ ⁄ inch), round </Td> <Td> 98% copper, 1.75% tin, 0.25% zinc </Td> </Tr> <Tr> <Td> 1978--1979 </Td> <Td> 3.24 g </Td> <Td> 19.05 mm (​ ⁄ inch), round </Td> <Td> 98% copper, 1.75% tin, 0.25% zinc </Td> </Tr> <Tr> <Td> 1942--1977 </Td> <Td> 3.24 g </Td> <Td> 19.05 mm (​ ⁄ inch), round </Td> <Td> 98% copper, 0.5% tin, 1.5% zinc </Td> </Tr> <Tr> <Td> 1920--1941 </Td> <Td> 3.24 g </Td> <Td> 19.05 mm (​ ⁄ inch), round </Td> <Td> 95.5% copper, 3% tin, 1.5% zinc </Td> </Tr> <Tr> <Td> 1876--1920 </Td> <Td> 5.67 g </Td> <Td> 25.4 mm (1 inch), round </Td> <Td> 95.5% copper, 3% tin, 1.5% zinc </Td> </Tr> <Tr> <Td> 1858--1859 </Td> <Td> 4.54 g </Td> <Td> 25.4 mm (1 inch), round </Td> <Td> 95% copper, 4% tin, 1% zinc (bronze) </Td> </Tr> </Table> <Tr> <Th> Years </Th> <Th> Mass </Th> <Th> Diameter / Shape </Th> <Th> Composition </Th> </Tr>

When did they stop using copper in canadian pennies
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