An old “Indiana Jones” type action adventure, in English, I saw probably in the 1970’s. I remember it in black and white but it might have been a black and white TV. At the end, a man and a woman escape (an island? under attack? a disaster?) with a load of treasure, but in order to gain altitude, they must throw all the treasure out. When everything has been thrown out, the man looks at the woman and realizes she has hidden an enormous gem in her mouth. She takes it out and utters some pithy line, and the movie ends.
Flight of the Lost Balloon