In 1997, they commemorated the 25th anniversary of the 1972 Canadian victory over the Russians in a much publicized hockey exhibition. As a bonus, it came with a weird little sterling silver pin.
Technically, the 1948 50c SP comes in concave and convex, but the curvature is very minor compared to this. The 1947 Maple Leaf 50c CR SP is also concave but I've never seen it noted anywhere, possibly because they're all that way. There, I acted like Mr. Smartypants.
Another set of sterling silver half-dollars, these from 1996. Cute, cuddly, baby animals, 3 of which could kill you. I don't know why the Wood Ducks turned blue.
Canada Ballet commemorative in 2001. Proof pictured on top, the uncirculated at the bottom would be popular with the guys from Big Bang Theory - it's new-in-box, unopened (still shrink-wrapped).
Thanks... you made me have to dig out my own set to remember the breeds. But I came across this while digging. 1980 Artic Territories
300th Anniversary of the Griffon. 826,695 struck as specimens. Marks are on the airtite. Composition Silver (.500) Weight 23.3276 g Diameter 36 mm Thickness 2.66 mm Shape Round Orientation Medal alignment ↑↑ References KM# 124