IMDB: https://www.imdb.com/title/tt0016957/
GERMAN TITLE: Die Filmkönigin
SPANKEE: Laura LaPlante
AGE: 22 (born 1904-11-01)
SPANKER: John Roche
Information from Dan N.: This movie still exists, and is available for public viewing at the UCLA Film Archives. I have seen it and I can report that Roche swings his strong right arm eleven times, and most of the swats are off screen... but not all of them! We can see that three of them DO land on Miss LaPlante's gorgeous behind.
No clip available so far.