J. Lavenu reports that 34 machines completed the seventh Championnat de la Bicyclette Polymultiplié, held on the 25th of April 1925. This number was composed of:
The derailleur is clearly king.
I like the picture of the dudes in their thick, prickly, woolen jackets, coats and hats inspecting the bikes after arrival. They have the hands-in-pockets look of sullen, sceptical, farmers pretending that they have been overcharged at a livestock auction.
(Source gallica.bnf.fr/ Bibliothèque nationale de France)