Silver Help

For circulation coinage? 40 years ago, I think. The last regular silver pieces are dated 1966, then came the silver Centennial set ('67), and the first nickel pieces are from 1968.

Christian

G'day, I researched the Canadian dollars a while ago, and this is what I discovered:
"... Canadian silver dollars were struck for circulation between 1935 and 1967 from an alloy of 80% silver with 20% copper, with each coin containing 0.6 troy ounces of pure silver. ... From 1968 until 1986 similar dollar coins continued to be struck for circulation, but of nickel with no silver content.
From 1968 to 1970 only nickel dollars were struck, but in 1971 the mint realized that there was a collector demand for actual SILVER dollars and instituted a series of special commemorative dollars that were never meant for circulation. The silver issues are 36 mm in diameter, making them easy to differentiate from nickel issues which are only 32 mm."
I haven't got around to researching the other denominations yet.
Peter in Oz