Le rendez-vous

Rendezvous is a 1961 French-Italian mystery crime film directed by Jean Delannoy and starring Annie Girardot, Andréa Parisy and Odile Versois. George Sanders appears in a small but significant role. It is based on the 1955 novel The Man With Two Wives by British-born writer Hugh Wheeler published under the pen name Patrick Quentin. It was shot at the Billancourt Studios in Paris. The film's sets were designed by the art director Lucien Aguettand.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster © the film's rights holders.