BLACK MASS: a 1920s obscurity?

Someone on the Classic Horror Discussion Board called attention to this strange little kinky film. I'm half inclined to think that it really originates later than the silent era--in fact, with sound and color, it could easily be a 70s production--but perhaps it's a dirty little obscurity from that earlier period. Any theories? WARNING: It's definitely not work safe.

UPDATE: According to Gary L. Prange in a post on the Classic Horror Discussion Board, the clip comes from a 1928 French stag film called MESSE NOIRE.