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Photograph of the cabin interior of a Lockheed Model 9 Orion aircraft, circa 1930s. The scene shows radio equipment and the entrance to the cockpit. Caption: "Van Plossem Studios / 54."

Photograph of a man seated in the cockpit of a Lockheed Model 9 Orion aircraft, circa 1930s. Caption: "Van Plossem Studios / 55."

Photograph of a man with a Lockheed Model 9 Orion aircraft, circa 1930s. Caption: "Van Plossem Studios / 56."

Photograph of two men with a Lockheed Model 9 Orion aircraft, circa 1930s. One of the men is holding a clipboard.Caption: "Van Plossem Studios / 57."

Photograph of two men with a Lockheed Model 9 Orion aircraft, circa 1930s. One of the men is kneeling on the wing. The other man is holding a clipboard.Caption: "Van Plossem Studios / 58."

Photograph of a man with a Lockheed Model 9 Orion aircraft, circa 1930s. Caption: "Van Plossem Studios / 59."

Photograph of a man working on a wing-mounted camera on a Lockheed Model 9 Orion aircraft, circa 1930s. Caption: "Van Plossem Studios / 60."

Photograph of a Lockheed aircraft factory, circa 1930s.Caption: "Van Plossem / C-132."

Photograph of workbenches in a Lockheed aircraft factory, circa 1930s. Several people on the right-hand side of the photo are working on a wing. Caption: "Van Plossem / C-129."

Photograph of four men with a Lockheed Vega aircraft, circa 1930s. Caption: "Van Plossem / C-74."