Can anyone identify this pusher plane from apparently the 1930s? I have performed two searches - a photo search and also an FAA NC number search and failed at both to identify this pusher airplane.  My family photo says it was taken by my mother at the Chicago airport in September 1937.  The NC number appears to be NC 15574 and I've tried several variations including dropping the &quot;1&quot; and trying &quot;9&quot; for the &quot;4&quot; but could not get an FAA NC match.  Your assistance in identifying this airplane and anything about it is greatly appreciated.
That is a Stearman-Hammond Y-S1, registration NC15524, construction  number 309.
The remains of the aircraft are now owned by the Dutch aviation museum  Aviodrome. They are planning to restore one of the four Stearman-Hammonds they have into flyable condition. This project is running since 2007, and is progressing very slowly.

source: Smithsonian National Air and Space Museum