Marcel Duchamp, Designs for Chessmen, c. 1920, Ink, pencil, and relief printing on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/35308

Marcel Duchamp, Handmade Stereopticon Slide, c. 1918–19, Pencil on gelatin silver prints mounted on black-paper-surfaced board, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/34823