Diamonds

A suave British dealer (Robert Shaw of Jaws) recruits an American thief (Richard Roundtree of Shaft) and his beautiful girlfriend (Barbara Hershey) for a true criminal masterpiece: the robbery of $100 million worth of cut gems from a vault inside an Israeli skyscraper and guarded by a state-of-the-art system designed by his identical twin brother (also played by Robert Shaw). But even if they can outsmart the alarms, crack the safe and snag the stones, how are the best thieves in the game going to escape with the world's biggest batch of Diamonds? (official distributor synopsis)