Watch 3-Way Split (1976) Official Trailer

One treasure. Three criminals. No rules.

Tony Pintana, an art collector, and his wife are contacted by Martin, who is short on cash and proposes to rob a museum of a Indian golden mask that's worth 10 million dollar. When their attempt miserably fails, the museum decides to have the mask transported to a safer location. The three try their luck again and are successful this time. Chased by a policeman who isn't convinced they're innocent, the three will have a difficult time selling the mask on the black market.