Yes you have them all, I did put this collection together years ago. We use to call it the white bear. 2005 Sask-Alta set is the scarcer one of them all.
This coin from the beginning had no residue on it and I gave it 2 acetone baths and cleaned under hot running water to clean the grove from the dirt that was in it. The coin is down to metal just stained. I did give close ups of the grove for inspections.
Found this 1981 Canadian 1 cent today and I think it was struck through a very long thread. I'm going to go with what you think it is. Did some close ups and don't forget the circulation and enviro damage over time. What do you think!!