The following text from Aviation Week is not unique to the aircraft pictured:
09/04/1961. Jacqueline Cochrane, president of the National Aeronautic Association, has claimed a new women's world jet speed record of 842.6 mph (1,356 kmh) for the 9.32 mls (15 km) straightaway course. Miss Cochran made the two passes over the course at Edwards AFB, California, USA, August 24, at 36,000 ft (10,973 m) altitude in a Northrop T-38 trainer.
Read the type remarks on page 11838.