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Chronodrometer
about 1859

The first mass-produced American stopwatch
The American Watch Company's chronodrometer, or improved timing watch, first appeared in the late 1850s. The Waltham, MA, company made about 600 of these watches between 1859 and 1861. The watch sold for $50, compared to as much as $350 for a high-grade European import.

Notes
About 2" in diameter

Learn more!
· How It Works
· "On Time," an NMAH Virtual Exhibition
· "Taking the Measure of Time" by Per Ola and Emily d'Aulaire, "Smithsonian" magazine, December 1999

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