Just re-discovered these while rummaging through my treasure chest of vintage oddities.
I thought some of you might like to see them and perhaps someone can guess their purpose.
Simple, clever and practical devices. They are made of a cast aluminum alloy.
Cyclo is the manufacturer which produced derailleurs, freewheels and many other clever gadgets.
If no one can guess their function, I'll explain later in the day.
These probably date from the 1950s, and you might occasionally use these on your Club Racer.
