Poster for a comics festival in Rochefort. This year’s guest of honor is Spirou (whatever that means); other guests include Tarrin, Feroumont and Bertrand Pissavy-Yvernault (La véritable histoire de Spirou).
The Turbotraction car keys are a nice detail! (I assume the telescope is some sort of local reference. The monument in the background is the Porte de l’Arsenal.)