1991 Scientific Achievements, Benham BLCS62 FDC, 50th Anniversary of the First Aircraft Turbo Jet Flight RAF Cranwell British Forces 2259 Postal Service H/S, Signed by Peter Twiss

5th March 1991 Scientific Achievements, Benham BLCS62 FDC, 50th Anniversary of the First Aircraft Turbo Jet Flight RAF Cranwell British Forces 2259 Postal Service H/S. Signed by Peter Twiss OBE, DSC & Bar was a British test pilot who holds the World Air Speed Record as the first man to fly a jet aircraft faster than 1,000 mph. Pristine Condition, unsealed. Complete with informative insert card.