Cyclo created their derailleur in 1924 and were the first company in the cycle industry to use Duralumin in 1927.

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

• Publisher: Le Forez Sportif
• Country: France
• Date: January 1938
• Derailleur brands: Cyclo
• Derailleurs: Le Cyclo 4-speed