"Euromarché" was a real chain of superstores (named Hypermarchés) combining grocery and department stores. Still as this day, this store in which the movie was shot stills exists as "Carrefour", located in Atis-Mons, south of Paris, France.
Fans consider this movie as the best from the "Charlots". Concidentally, the group mentions it's their favorite in their book.
Heroes' names are just actors' names.
Michel Galabru and Michel Serrault would later be "almost" nemesis in the famed comedy "La Cage aux Folles", as Galabru portraits a homophobic candidate, and Serreault as a gay travesty, who hosts for a marital meeting for his boyfriend's son...