This low-res, deliberately smudged, scan is from the web site of the excellent Musée d'Art et d'Industrie in St-Étienne.

It shows an advert by Claudius Jacquemard for the Idéal brand of cycle components. At this time the Idéal range did not yet include any derailleurs, but did include a 2-speed freewheel.

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• Publisher: L'Industrie des Cycles et Automobiles
• Country: France
• Date: January 1925
• Derailleur brands: Idéal
• Derailleurs: none