Photo #: NH 41731
Naval Aircraft Factory, Philadelphia, Pennsylvania
Hull of an experimental F6L flying boat under construction at the Naval Aircraft Factory, 19 October 1918.
Note influenza precaution sign in the left background. The "Spanish Influenza" epidemic was then extremely active in Philadelphia.
See Photo # NH 41731-A for a closer view of this sign.
U.S. Naval Historical Center Photograph.
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Image posted 27 December 2005