In this advert, dated January 1951, Campagnolo is advertising 'front and rear derailleurs'. This is in contrast to their advert of October 1950 which advertises a rod-type 'speed changer with no chain tensioner'. The king is dead, long live the king!

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

• Publisher: L'Officiel A.C.M.
• Country: France
• Date: January 1951
• Derailleur brands: Campagnolo
• Derailleurs: Campagnolo Gran Sport?