Birillo Stool1971 · Stainless steel, fiberglass, and vinyl107 × 47 × 52.1 cm (42 1/8 × 18 1/2 × 20 1/2 in.)Art Institute of Chicago
WattsOSPOPhotographs of Multi-chair1970 · Gelatin silver printsa: 7 1/8 × 9 1/2 in. (18.1 × 24.1 cm) b: 7 1/8 × 9 1/2 in. (18.1 × 24.1 cm) c: 9 × 12 1/8 in. (22.9 × 30.8 cm)The Metropolitan Museum of Art
WattsOS"C"Tube" Chair1969 · Synthetic knit upholstery, polyurethane foam (PUR), poly(vinyl chloride) (PVC), natural rubber, and tubular steel1987.98.1a-d Assembled chair: 26 1/2 × 24 15/16 × 46 15/16 in., 36.4 lb. (67.3 × 63.3 × 119.3 cm, 16.5 kg)The Metropolitan Museum of Art
WattsOSPOPhotographs of "Tube" Chair1969 · Gelatin silver printsa: 9 5/8 × 11 7/8 in. (24.4 × 30.2 cm) b: 9 1/2 × 12 in. (24.1 × 30.5 cm) c: 9 5/8 × 11 7/8 in. (24.4 × 30.2 cm)The Metropolitan Museum of Art
WattsOSPOPhotographs of "Spring" Light1968 · Gelatin silver printsa: 14 1/8 × 10 1/4 in. (35.9 × 26 cm) b: 6 × 4 1/8 in. (15.2 × 10.5 cm) c: 5 7/8 × 4 in. (14.9 × 10.2 cm)The Metropolitan Museum of Art
WattsOSPOPhotographs of "Additional Chair System"1967 · Gelatin silver printsa: 7 1/8 × 9 1/2 in. (18.1 × 24.1 cm) b: 7 1/8 × 9 1/2 in. (18.1 × 24.1 cm) c: 7 1/8 × 9 1/2 in. (18.1 × 24.1 cm) d: 7 1/8 × 9 1/2 in. (18.1 × 24.1 cm) e: 7 1/8 × 9 1/2 in. (18.1 × 24.1 cm) f: 9 3/8 × 7 1/8 in. (23.8 × 18.1 cm)The Metropolitan Museum of Art
WattsOSPOPhotographs of container1964 · Gelatin silver printsa: 9 1/16 × 6 3/4 in. (23 × 17.1 cm) b: 8 7/8 × 6 3/8 in. (22.5 × 16.2 cm)The Metropolitan Museum of Art