This adverts celebrates the success of Huret derailleurs at the 1944 Criterium de la Poly. The most interesting thing about it is that it is the same size and shape as, and contains much the same content as, an advert in the same edition of L'Auto placed by Chaluret. Up until 1938, Chaluret had manufactured derailleurs for Huret and the two companies had been joined at the hip. By 1944 they were fierce competitors, matching each other punch for punch in a fight for their corner of the derailleur market.
(Source gallica.bnf.fr/ Bibliothèque nationale de France)