This is the cover of the Union des Audax Français newsletter from January 1967 in which the Maurice Macaudière's article (linkded below) appears. The picture features the winners - Maurice Macaudière, and behind him, Robert Demilly. The picture is from the final stage of PBP, between Dreux and Paris. No photographer is credited in the newsletter.
Thanks to Jean Richard who provided this image. In passing, Jean mentioned a few additional tid-bits about the cover: "By the way (I had absolutely forgotten this detail), the design of the page was my work, with the armorials of both cities, Paris and Brest, on the top, and those of the Dukedom of Britanny, respectively the County of Paris on the bottom. Bernard Déon has made use of the picture in his book with the mention: "Photo Miroir du Cyclisme" (a specialized French cycling review) ."
PBP Photos - 1966