Double studio portrait on one negative

Double studio portrait on one negative. On the top picture, two men wearing a white shirt. They both look at the camera. On the bottom photo, picture of two boys dressed like adults, white white shirts, ties. One also has glasses. They both face the camera. No backdrop. Date of original material: [1953-54]. Size of original print/negative: 3 ½ x 2 ½ inches (2B). Format of original material: Glass plate black and white negative.