Keywords: Northrop XBT-1 Dec 1936.jpg The Northrop XBT-1 BuNo 9745 on 4 December 1936 U S Navy National Museum of Naval Aviation photo No 1996 253 1990 http //collections naval aviation museum/emuwebdoncoms/pages/doncoms/Display php irn 16034855 QueryPage 2FQuery php 1936-12-04 U S Navy PD-USGov-Military-Navy Northrop BT |