Double studio portrait on one negative

Double studio portrait on one negative. On the left picture, a man wears a shirt and round glasses. He looks straight at the camera. On the right photo, a woman wears a sari with a blouse. She wears light jewellery. No backdrop. Date of original material: [1954-55]. Size of original print/negative: 3 ½ x 2 ½ inches (2B). Format of original material: Glass plate black and white negative.