This is the end of The Train by John Frankenheimer – moral ambiguity etc. One you should watch, another early 60s black and white film much overlooked.
The Train is a 1964 black-and-white war film directed by John Frankenheimer from a story and screenplay by Franklin Coen and Frank Davis, based on the non-fiction book Le front de l’art by Rose Valland, who documented the works of art placed in storage that had been looted by the Germans from museums and private art collections. It stars Burt Lancaster, Paul Scofield, and Jeanne Moreau.
Set in August 1944, the film sets French Resistance-member Paul Labiche (Lancaster) against German Colonel Franz von Waldheim (Scofield), who is attempting to move stolen art masterpieces by train to Germany. Inspiration for the scenes of the train’s interception came from the real-life events surrounding train No. 40,044 as it was seized and examined by Lt. Alexandre Rosenberg of the Free French forces outside Paris.