I've got a 1973 Gitane frame, Reynolds 531 DB decal on the downtube...Mafac Competitions, Super Record FD, Huret RD. The rear drops are a series of hexagonals with a fixed axle. They've got a single rack eyelet. Are these Huret dropouts? Unfortunately the fork has been replaced so no clues there. I can't find pix of these dropouts on the net.
Jim Hultman
Santa Barbara