Boizot (now Boizot-Tracol) are still advertising their ‘Le Montagnard’ derailleur in 1929.

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

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• Publisher: T.C.F. Revue Mensuelle
• Country: France
• Date: January 1929
• Derailleur brands: Boizot
• Derailleurs: Boizot Le Montagnard