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Old 25th June 2014 | 22:32
  #4664 (permalink)  
Noyade
 
Joined: May 2009
Posts: 10,284
Likes: 26
From: New South Wales
Some clues then...

It's a Pratt and Whitney R-1535-7 engine.
Circa 1936.
The aircraft is serving with the 118th Observation Squadron Guard.
Photographed in the maintenance hangar at Brainart Field, Hartford.
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