Important Modern & Vintage Timepieces

Geneva, Nov 10, 2013

LOT 269

NATIONAL WATCH SINGLE BUTTON CHRONO National Watch, La Chaux-de-Fonds, case No. 3933, Ref. 7535. Made in the 1920s. Fine and rare, 18K yellow gold wristwatch with single button chronograph, register telemeter and tachometer.

Four-body, polished, rounded bezel, central wire lugs, engraved gold cuvette. White enamel with painted black Arabic numerals, subsidiary seconds and 30-minute register dials, outer 1/5th seconds track with 5-minute/seconds Arabic markers, inner concentric red tachometer scale, outermost red telemeter scale. Blued steel Breguet hands. Cal. 15 ''', frosted gilt, straight-line lever escapement, monometallic balance, steel Breguet balance spring, index regulator, the single button at 6 is for the start/ stop and return to zero functions of the chronograph.