This particular aircraft actually served in the USN with VX-4 as 77233 being one of 20 brand new B-17Gs allocated to the Cadillac II programme (land-based long-range Airborne Early Warning, command and control system) until replaced by WV-2 Warning Stars. In 1956 she was converted to a water bomber and flew with Butler Aviation as N5237V. After acquisition by the RAF Museum she was converted to 1944 USAAF configuration and displayed in markings representing the 94th BG, 8th AF based at Bury St. Edmunds.