Corrected entry: In the movie they show the filming of many scenes in the silent movie. They use a "Clapboard" to start the scene. Granted the slate part was accurate but the clapper was designed for sound use to line up sound with the film, so wouldn't have been used before the advent of talkies.
The Artist (2011)
1 corrected entry
Directed by: Michel Hazanavicius
Starring: John Goodman, James Cromwell, Berenice Bejo, Jean Dujardin
Continuity mistake: When Peppy Miller is stepping ahead in the casting scene, she puts down her things on the floor. In the next shot, when she starts dancing, her things disappear. After dancing, her stuff reappears on the floor, where she picks it up.
George Valentin: With pleasure.
Trivia: Jean Dujardin won an Academy Award for Best Actor for his role as George Valentin, making him the first French actor to win the Award.
Correction: Wrong. The filming of silent films are shown using slates that don't have clappers. Clapboard slates are used only in the depiction of what are talkies within the world of the film (such as in the final scene).
Vader47000