Another run-through of a plethora contemporary gear systems by the redoubtable Paul de Vivie.

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

• Publisher: T.C.F. Revue Mensuelle
• Country: France
• Date: January 1912
• Derailleur brands: de Vivie, Terrot, Whippet
• Derailleurs: nothing specific