OK. AFAIK, Cyclo is a French brand. The important thing is that it is "Made in France", which means it is probably French threaded as is the hub, and the hub is probably French as well, such as Pellisier as Slugo suggested. So, you will either have to use the same freewheel if you build up your hubs into a wheel, or find another French threaded freewheel. Your best bet would be an Atom or possibly a Regina with a French body.