Some nice photos, a Falcon in France?
I'd guess (Falcon, Hetchins, Dursley Pedersens, Moulton AM14) there was a strong British contingent.
That is the biggest jump on front chainrings
Wide-range doubles were very popular at one time on French touring bikes. Feast your eyes:http://www.reneherse.com/singerchrome.htmlhttp://www.reneherse.com/1968blue.html
and what a huge rear gear, what mech takes all that chain slack up ?
Campagnolo Rally, innit.
Calmes dans le demi-jour
Que les branches hautes font,
Pénétrons bien notre amour
De ce silence profond.