Just finished cleaning the bottom bracket.
Looking closely at the crank axle, I saw that "CCM 220" was written on it. Wonder what that means.
I also looked more closely at the pedals. On the side, it says "Patent, July 10 1923". These are therefore probably the original pedals. They are all metal. No black rubber blocks like in many platform pedals. Is it likely that there was rubber initially or is it possible that at the beginning of the century, there was none?