ZENITH. Chronotachymeter in gold probably "Grand prix de Paris 1900". Pilot's and sportsman's tachometer pocket watch graduated with 5 different-colored speed scales (for maximum reading visibility), capable of timing the fastest automobiles of the era. Jumping minute on the chronograph. Round gold case, signed and numbered. Enameled white dial with graduation scales, small minute counter at 12 o'clock and seconds counter at 6 o'clock, featuring the colors of the graduation scales for the first 5 minutes. Arabic numerals for hours and chronograph release, reset by simply pressing the push-button at 12 o'clock. Note that the chrono has been tested in aviation. Movement: ZENITH hand-wound mechanical caliber. D: 52 mm. Gross weight: 92.7 g

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