One day last week, in the Elgin Watch factory in Elgin, ILL., a brand-new watch was dropped into a boiling bath of nitrohydrochloric acid. In a few minutes all of the watch was dissolved except the jewels —and the mainspring. It was as bright, hard and flexible as ever.
By this acid test, Elgin National Watch Co. demonstrated its new spring, which it called the biggest thing in watchmaking since the introduction of jewel bearings in 1704. Mainsprings have been the source of about half of all watch troubles. Elgin bragged that its new spring,...
To continue reading:
or
Log-In
