The Necklace 1931

Directed by Marc Allégret

A professional female thief figures out an original way to steal a precious necklace: she takes a gullible jeweler to a psychiatrist, poses as his wife and passes him off as a lunatic. Dr. Schwartz falls into the trap and has the poor jeweler committed to a mental hospital. Meanwhile, the thief lays hands on the necklace and vanishes into thin air.