English: Curtiss JN-series biplanes of the New York City Police Department (NYPD) departing for a patrol mission (circa 1918-1919), as published in the the 1918 annual police department report.
Date
Source
New York City Police Department Annual Report (1918)
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Captions
Curtiss JN-series biplanes of the New York City Police Department (NYPD) departing for a patrol mission (circa 1918-1919)
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