The Steel Lady

Surviving a plane crash in the Sahara, four oilmen find and manage to repair a German Afrika Corps tank which had been buried in the sand since WWII. Heading toward a French Foreign Legion outpost, they encounter a nomadic Arab tribe who believe the oilmen have found the treasure of Calipha, a rival Arab leader. If trying to acquire the jewels by guile doesn't work, the Arabs are prepared to kill the oilmen to get the stolen treasure.