Photograph of students displaying USC's trademark, SoCal, using stunt cards during a football game, ca. 1923. "USC card stunt. University of Southern California, Pictorial History Project" -- clipping attached to the verso. "Trademark. From the USC campus, the sequential card stunt swept the nation. Bothwell's first effort involved fewer than 300 persons. Today, computerized and highly sophisticated, card stunts involve 3000 card-holding students. Above: USC's familiar trademark" -- The Trojan gallery, p. 80.