Appointment with Danger (1950)
Both as "Now showing" and as a poster outside the movie theater. However, it's called "This Gun Is Mine" in both cases. There is a poster called "This Gun Is Mine" and it stars Alan Ladd, Phyllis Calvert and Paul Stewart, who together only made one movie - Appointment with Danger.
There is a poster for the film outside the Ministry of Food Office.
poster on office wall
Mindelo's flyer shown by the film exibitor, half a century later, titled Suprema Derrota.
An announcer plugs the movie by its working title, "United States Mail".
The film is played in the mess hall for Movie Night.