I photographed Sperry Ball Turret examples on display at Yanks Air Museum in Chino, and the Champaign Air Museum in Urbana.

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Sperry Ball Turret

Yanks Air Museum, Chino 2018

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Sperry Ball Turret

Imperial War Museum, Duxford 2019

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Sperry Ball Turret

Champaign Air Museum / Grimes Field (Urbana) 2018