B&W. "Stanford Cart" written in pencil on photo verso right bottom. Blue pencil, rectangular geometric pattern on tracing paper glued to back, probably indicating the 35.5% reduction. "15D" in black ink, verso tracing paper bottom left. "REDUCE TO 35.5% ES.(double underlined) 3 3/8 x 2 5/16" in black ink on verso tracing paper top left. Photo of robotic cart, visible motors and circuit boards, plus a "telescope" mounted on top. Large wire wheels with pneumatic tires, visible wiring into cart. Environment is cluttered with other robots and a sign "CAUTION ROBOT VEHICLE" ?