Borderline

Borderline is a 1930 film, written and directed by Kenneth Macpherson and produced by the Pool Group in Territet, Switzerland. The silent film, with English title cards, is primarily noted for its handling of the contentious issue of interracial relationships, using avant-garde experimental film-making techniques.

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

Poster © the film's rights holders.