A year after his first patent (French patent # 736,594) Oscar Egg has seen the light. The derailleur (now called Super Champion) works on the lower run of the chain - allowing you to change gear while pedalling forwards. The drawing shows a four speed system.

• Publisher: L’Institut national de la propriété industrielle
• Inventor: Oscar Egg
• Country: France
• Date: French application July 1933
• Derailleur brands: Super Champion
• Derailleurs: Super Champion