DISRAELI DOCUMENTS
A quick survey of 211 machines taking part in a TCF ride on 13th April 1924 at L’Etang-la Ville, near Paris, showed:
and
The 62 derailleur systems included 7 examples of 2 X 4 speed systems, 24 examples of 2 X 3 speed systems, 7 four speed systems, 22 three speed systems and 2 two speed systems.
Strangely the sample includes 6 Hirondelle models - but the analysis does not seem to include any retro-direct transmissions.
(Source gallica.bnf.fr/ Bibliothèque nationale de France)