Douglas O2-H thejivebombers Army Air Corps & Army Air Service January 20, 2018April 21, 2020 1 Minute Serial 29-159. I believe this aircraft was assigned to the 91st Observation Squadron. Share this:TwitterFacebookLike this:Like Loading... Related Published by thejivebombers View all posts by thejivebombers Published January 20, 2018April 21, 2020