Please post a new, separate question with the coin's denomination - cent, dime, dollar, etc.
The value of a 1949 Canadian silver dollar depends on the condition of the coin. Such a coin would fetch between 21 and 27 US dollars at auction.
In good condition, I've seen 1949 quarters sell as high as $9.99.
The value of a 1922 Canadian 5 cent coin is (if in good condition) $0.20.
Check that coin again. Canada didn't half a halfpenny in 1949.
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How much is 1903 Canadian dime worth
Face value only.
A 1961 Canadian 25-cent coin can be worth about $6. A coin's actual value would be based on the silver market at the time of purchase or sale.
The world coin that has the largest ratio of size per monetary value is the Canadian mint $1,000,000 coin. The Canadian mint $1,000,000 coin weighs 100 kilograms.
1-1000000
$1650.00
about $10