This advert is possibly the earliest mention that I have found of the Super-Cyclo and the Cyclo Poly.

(Source gallica.bnf.fr/ Bibliothèque nationale de France)

• Publisher: Le Forez Sportif
• Country: France
• Date: October 1935
• Derailleur brands: Cyclo
• Derailleurs: Super-Cyclo, Cyclo Poly