Pocket Knife/Multitool, Swiss Champ SOS, ca. 1985; Designed and manufactured by Victorinox (Switzerland). Photo: Ellen McDermott. © Smithsonian Institution

Pocket Knife/Multitool, Swiss Champ SOS, ca. 1985; Designed and manufactured by Victorinox (Switzerland); Stainless steel, Cellidor® (cellulose acetate-butyrate), and variable materials; Case (closed): 11.1 x 6.4 x 4.4 cm (4 3/8 x 2 1/2 x 1 3/4 in.); Cooper Hewitt, Smithsonian Design Museum, New York, Gift of Victorinox, 2013-56-1-a/x; Photo by Ellen McDermott © Smithsonian Institution