91st Observation Squadron, Crissy Field, 1931 thejivebombers Army Air Corps & Army Air Service August 15, 2018April 20, 2020 1 Minute The squadron had just received the new Douglas O-25, and the aircraft are immaculate. Serials visible are: 31-169, 170,171,172. Share this:TwitterFacebookLike this:Like Loading... Related Published by thejivebombers View all posts by thejivebombers Published August 15, 2018April 20, 2020