Produced at Douglas, Long Beach
Information from Johan Visschedijk
Built as Model 299P B-17G-95-DL, USAAF serial 44-83877. Transferred to USN under BuNo. 77241 and intended for conversion to PB-1W. However, it was never modified and remained as a standard B-17G and was designated PB-1 only, see designation on rudder.
Aeroplane Photo Supply No. 4297