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@dmczone
Old technology, rendered obsolete by square tapered spindles and cranks, but good enough to win pro races in the 50s and before.
While top racing bikes made the switch many mid to lower end models continued with cottered cranks for some time.
Cotter pins would come lose and fall out if you weren't careful. And then your crank would come off because the spindle was round.
If the crank is from the last 30+- years it's likely steel and junk.
If before that it could possibly be collectable.
Ride what you want as long as you ride.