Here’s a beautiful old strip map of the Paris Métro’s Ligne 12, which runs from Mairie d’Issy to Porte de la Chapelle. This map is located in one of the few remaining old Sprague-Thomson cars, once the workhorse of the Métro.

The fact that Rennes station is crossed out dates the map from between World War II, when it was closed, and September 1968, when it was (finally) reopened. Judging by the general aesthetics and design of the map, I would definitely place this map at the beginning of that time frame, possibly even still during war-time.

Source: Cortez77_fr /Flickr