This is possibly the thinnest advert in the world. It advertises ‘bicycles with multiple gears’ that are available from Paul de Vivie. Mysteriously his address is given as Rue Vendôme in Lyon. I don’t know why this should be - surely he was based in his beloved St-Étienne.

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

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• Publisher: T.C.F. Revue Mensuelle
• Country: France
• Date: December 1900
• Derailleur brands: de Vivie
• Derailleurs: probably none