Walt.
It sounds like you have several Canadian pieces but are focusing on only 1 thing. Basically there were 4 different Canadian stickers that were placed on pieces.
1. Rectangular sticker with "Made in Canda" (text only).
2. Round sticker with a Maple Leaf (no text).
3. Rectangular sticker with maple leaf & "Made in Canada" text.
4. Large round sticker with "Made in Canada" text.
However, many times the sticker has fallen off the pieces and you need to look at the other indicators of origin of production. Such things as the felt, details of windows and doors, paint, box, and production modifications (ie ventilator cap ring) will tell you if you have a true Canadian mold. Don't get so concerned about the sticker. Although it is nice to have, and probably add value to your piece, there are many other ways that will indicate a true Canadian. I find that the HL website, the 1998 Greenbook, and of course the forums, are the best way to seek information.