Factory workers perform final checks on a Lockheed PV-1 Ventura at the Vega Aircraft Company plant in Burbank, California. (U.S. National Archives and Records Administration Photograph.)
The Lockheed Ventura was based on the civilian Lockheed Model 18 Lodestar transport, and later the PV-1 was revised for U.S. Navy anti-submarine use as the PV-2 Harpoon.
