The British-built D.H.4 delivered to McCook Field for evaluation in August 1917.
Views of a US-built DH-4 with experimental flotation gear, showing the air bags deflated and inflated.
A US Army photograph said to depict the "last DH-4 at Clermont-Ferrand", about December 1918.
The DH-4M-1 after completion of restoration by the USAF Museum, showing the colour scheme and markings based on those of the aircraft originally flown by Maj Gen Mason M Patrick.
Another view of the beautifully restored DH-4M-1
Two views of the DH-4M-1 being manoeuvred into its permanent exhibition site in the USAF Museum.
A typical DH-4 mail plane; the Museum example probably looked like this in its mail-carrying days.
General Patrick’s original aircraft, which the restoration has been painted to represent.
Three stages in the life of DH-4M-1: As restored in 1938, with new fabric and a coat of paint, for the Air Mail commemorative flight.
Three stages in the life of DH-4M-1: N -489 as it appeared at the Detroit war-bond sales drive in 1944, with its former owner A K Miller in the front cockpit.
Three stages in the life of DH-4M-1: Back in mailplane configuration, N -489 was displayed in this guise at the USAF Museum until January 1982.
The wing assembly shop in the DH-4 production factory at Fisher Body, Detroit, about 1918.