À bientôt, j'espère (1968)

À bientôt, j'espère (literally translates as Until soon, I hope) is a 1968 French documentary film directed by Chris Marker and Mario Marret. It tells the story of a strike action at a textile factory in Besançon in March 1967. The film was shot in black and white, with photography by Pierre Lhomme.

More at Wikipedia.