Full 531--tubes, stays, fork. Stronglight crankset, Simplex FD/RD & shifters, and it was 2 x 5 for a "10-speed". It originally had Mafac centerpulls, and the original headset was silver. French thread/sizes everywhere. When I got it back to the US, I had to catalog-order tires, since 700c clinchers were something new (the similar PX10 had sew-ups). It had a Silca pump that would pop in along the seat tube between BB and top (which was also usable as a baton when fending off farm dogs). No bottle bosses. Large flange hubs (known to ride harder, IIRC), and also tied spokes--very stiff. It was an off-the-shelf purchase--I didn't know French.
I thought I was going to ride to Spain, but gave up after about a week. Hopped a train in Angers back to Paris.
@microcord Wired. You can see the wire going down the stem and head, and it goes on down via the BB to the rear stay, where you can kind of see a sensor attached. Then just below that is the spoke-mounted magnet: