A handsome pair of OA-4B seaplanes thejivebombers Army Air Corps & Army Air Service February 5, 2018April 20, 2020 1 Minute The first wears the insignia of the 30th Bomb Squadron which flew the OA-4B from 1932-36. Share this:TwitterFacebookLike this:Like Loading... Related Published by thejivebombers View all posts by thejivebombers Published February 5, 2018April 20, 2020