First of the GAF upgraded spec aircraft (B.6 equivalent) with 7,500 lb thrust Avon Mark 109/RA.7 engines and the provision for wing leading edge fuel tanks. Served with 2 Sqn in Vietnam as part of USAF 35th Tactical Fighter Wing based at Phan Rang Air Base (approx 150 miles north east of Saigon). Arrived 05/67. Destroyed 14/03/71 after being hit by two SA-2. Surface to Air Missiles (SAMS). Both Crew; WGCDR (P) F. Downing and FLTLT (N) A. Pinches ejected near Quang Tri, Vietnam at 14,000 ft and 290 kts, suffering various moderate to serious injuries and were rescued 27 hours