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The Royal Canadian Mint issued the first silver dollar in 1935 to commemorate the Silver Jubilee of King George V. The coin’s reverse design was sculpted by Emanuel Hahn and portrays a voyageur and an aboriginal paddling a birch-bark canoe. The faint lines in the background represent the Northern Lights. The voyageur design was used on the dollar until 1986.[1] It was then replaced with the 1987 Canadian 1 dollar coin (Loonie). 1967 marked the end of the silver dollar as a business strike, or a coin issued for circulation. After 1967 the dollar coin was made of nickel, except for non-circulating commemorative issues for the collector market, which continue to contain silver.

http://en.wikipedia.org/wiki/Canadian_silver_dollar