Continuity mistake: In the masked ball scene, St. Ives grabs a party goer and steals his mask which you then see him putting on. It is a gold mask without any markings that covers most of his face, but a few moments later when St. Ives dances with Flora, he is wearing a much smaller gold mask with black decorative markings.
St. Ives (1976)
1 continuity mistake
Directed by: J. Lee Thompson
Starring: Charles Bronson, Jacqueline Bisset, John Houseman, Maximilian Schell
Factual error: St. Ives is invited to sit in a Lincoln Continental. When he does, one of the owner's subordinates opens fire with a machine gun having what appears to be a 50-round clip. Problem is, he fires over a hundred rounds.