It's not clear what the top illustration is based on, however, before ordering new trolleybuses, la Compagnie du Chemin de Fer Métropolitain (CMP), which took over the surface network in 1942, tested diverse prototypes, one of which was a Vétra of the Lyon network, with three doors.
The bottom illustration was a generic one from the 1950s for trolleybus system maps by the company stated. Ca filoche can mean it slips (folds) away, or perhaps it enables the discovery of information.
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