Women workers on assembly line for aircraft flight instruments, Ternstedt Manufacturing Division plant

View of women workers assembling aircraft flight instruments at the Ternstedt Manufacturing Division factory. Label on back: "Assembly-line production of aircraft flight instruments has been successfully achieved for the first time at a Ternstedt plant of the Fisher Body Division of General Motors. Requiring far more precision work than ordinary watchmaking, the instruments now are being produced in volume 10 times greater than originally scheduled. As an example of the precision required, one balancing operation is so sensitive that a quarter-inch pencil mark can actually be weighed. In other words a tiny speck weighing less than a millionth of an ounce registers on the indicator. 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."