Women workers calibrating gyro horizon instruments, Ternstedt Manufacturing Division plant

View of women workers calibrating aircraft gyro horizon instruments at the Ternstedt Manufacturing Division factory. Label on back: "One of the final tests in manufacturing of gyro horizon instruments for aircraft is calibration, and shown above is scene from a Ternstedt plant of the Fisher Body Division of General Motors Corporation where such instruments are being built for the Army. Each girl, equipped with a stop-watch, calibrates a bank of four instruments. The instruments must be accurate to the closest degree, for they will soon be guiding pilots on bomber flight at battle-fronts around the world. From W.S. McLean, Fisher Body Division, General Motors Corporation, Detroit, Michigan. Note editor: This photo and caption have been reviewed by the War Department." Stamped on back: "Fisher Body Photographic, 3-258 General Motors Bldg., Detroit, Mich." Handwritten on back: "Women workers."