As far as French film noir is concerned ,Sergio Gobbi represents the nadir .All his movies are simplistic and derivative ,and when he has got a good idea ,he is not able to exploit it successfully: making the cop and the gangster school friends was certainly interesting ,but when it consists of sepia old movies introduced in the present, it does not amount to anything;and however ,both studied in an independent Roman Catholic school!!The cop (Aznavour) has a talk with the venerable priest principal; The gangster(Hossein) ,fascinated by the American names,calls himself "Dillinger" and when he meets the blond Virna Lisi -whose part is inept- ,it looks like a poor man's "Bonnie And Clyde"
Music by Aznavour/Gavarentz;a song was even written and was on the radio (the title of the film) but is not heard in the movie.
The movie was released late 1969;the IMDb information is not quite accurate .