I worked on a more recent CCM model last week. Cottered cranks and chain guards screwed in with Robertson screws. Unfortunately no one in the US knows what a Robertson screw is, so we didn't have a suitable screw driver at the bike co-op and I ended up having to remove it with a vise-grip.

Also the frame was pinned or bolted at the rear dropouts. Like how your seat stay is attached to the seat tube.