This BSA is fitted with the ‘Système de Vivie’ - but in this case it only offers three speeds. Previous small ads have featured 4 speed transmissions.

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

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• Publisher: T.C.F. Revue Mensuelle
• Country: France
• Date: March 1902
• Derailleur brands: de Vivie
• Derailleurs: none (Système de Vivie)