Diamonds (Diamond Shaft) (1975)

Charles Hodgson is a British aristocrat who decides to become a thief as a way of getting at his twin brother, Earl, a security expert who has built a supposedly impregnable vault in Tel Aviv, which holds a cache of diamonds. For the caper, Charles enlists Archie, a heist expert, and Sally. He also becomes acquainted with an American woman, Zelda Shapiro, who is in Israel looking for a new husband.