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...and the tandem Martin (with the same spelling error as on the backside of the Audax finisher medal: "en" bicyclette instead of "à" -"en" would apply to a car, a train or some other closed vehicle it is a common rule in all languages "in" the car, but "on" the bicycle).

Source: Miroir du Cyclisme, No. 78, Octrober 1966 (article by Roger Baumann):
Paris-Brest-Brest: a sarcé en Demilly et Macaudière d'authentiques champions
(Image and caption provided by Jean Richard)

PBP Photos - 1966