I had a CCM w/ a frame like Paul described. Someone gave it to me. It could have been back on the road w/ some work.
Simplex Prestige derailleurs, cottered crank, centerpull brakes & a rotted Brooks B15(?). It also had the worst lug outlining I have ever seen - ugly.
I passed it on to someone else exactly the way I received it.
Grant McLean and I were just having a quick conversation on-line about a frame which is hanging in my local used-bike store. It is a CCM with simple straight gauge three tubes decal - dropouts are just stamped, lugs fairly simple. Dark green, chromed end to forks.
Grant only remembers that the last time he rode a CCM it had 20" wheels - I just remember CCM as low-end - made skates and hockey equipment - Canadian to the core. Anyone, particularly the Canucks on the list, know anything about 531 CCM's?
Paul Williams, Ottawa "where it actually got up to -3C today" ON, Canada.