Oscar Egg launches his new 3-speed derailleur on his own brand racing bikes for model year 1933. Note that the derailleur is called a 'Champion' and not yet a 'Super Champion'.

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

• Publisher: L'Auto
• Country: France
• Date: April 1933
• Derailleur brands: Super Champion
• Derailleurs: Champion