Studio full-size portrait of two boys

Studio full-size portrait of two boys. Both of them are sitting on a structure, and have folded their left leg on the right one. They wear a shirt and shorts. Backdrop: a curtain opening on a outside landscape. Date of original material: [1961]. Size of original print/negative: 2 ½ x 2 ½ inches (120). Format of original material: Film black and white negative.