Image: Keystone PK-1 in flight
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Description: A U.S. Navy Keystone PK-1 flying boat in flight. Keystone Aircraft produced 18 Naval Aircraft Factory PN-12 under licence as PK-1s. These aircraft served with patrol squadron VP-1F from 1932 to 1938.
Title: Keystone PK-1 in flight
Credit: U.S. Navy Naval History Center Dictionary of American Naval Aviation Squadrons. Volume 2: The History of VP, VPB, VP(H) and VP(AM) Squadrons [1]
Author: USN
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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