By 1935 Alcyon had moved on from the Centrix Course derailleur, and adopted a Super Champion model. Note that the chain tensioning arm in the drawing attaches to the down tube, not to the chainstays as in the earlier Super Champion designs.

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

• Publisher: L'Auto
• Country: France
• Date: 17th June 1935
• Derailleur brands: Super Champion
• Derailleurs: Super Champion Luxe?