Loening
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Keystone Aircraft
Jake Swirbul
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Leroy Grumman
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Keystone B-6
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Keystone B-5
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Keystone B-3
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Keystone B-4
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Huff-Daland XB-1
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Keystone
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Curtiss-Wright
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Bucks County, Pennsylvania
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Keystone-Loening
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