PRECISION OF A FINE WATCH

CD 1966049 E&MP30.005

Electric Meters

May 18, 1938

Built with the precision that goes into a fine watch, yet so rugged it lasts a lifetime; each meter contains 275 parts, requires thousands of manufacturing operations.

To cut 8000 miles of thread screws yearly, some of them only seventeen-thousandths of an inch in diameter, requires fine tools such as the one being ground above.

It will be used in a delicate watch-lathe set-up. 

Original Caption by Science Service
^©Westinghouse