Photograph of close-up view of woman worker handling a panel with knobs at Ircal Industries, ca.1940. In the foreground at center, a single woman with her back to the camera is seen seated in a chair. The woman wears a thin, lightly-colored blouse with a laced collar. A large decorative earring is visible, and a watch is seen around her left wrist. The woman stares at a rectangular panel with several knobs on its front. The woman is seen gripping the fourth knob from the left with her right hand to adjust it slightly. Hanging above the panel, a large light can be seen. To the right of the panel, a small rectangular box is visible with a small plaque on its front that reads: "Rubicon Company". To the left of the panel, two small boxes are visible. The smaller, darkly-colored box has a single knob on its front that can point to several numbers arranged in an arc around the knob. Adjacent to this box in the foreground, a lidless box is visible with a wire grid lining its interior. Small cylinders connected to long wires can be seen protruding from the cells of the grid. In the extreme background, a stool can be seen sitting beside another table.