A very fine silver single button split-seconds keyless lever chronograph watch with 60-minute register awarded 1st Class Certificate at the Bescançon Observatory, with original fitted presentation case

19’’’ nickel movement, lever escapement, damascened decoration, highly jewelled, Guillaume balance, blued steel balance spring with overcoil, the chronograph and split mechanism mounted to the backplate

white enamel dial, Breguet numerals, two subsidiary dials for 60-minute register and constant seconds, outer scale for minutes/seconds calibrated to fifths and with Arabic 5-minute/second markers, outermost red scale for tachymeter, blued steel Breguet hands, blued steel split seconds hands, signed Breguet no. 3704

silver case, milled band, chronograph pusher through crown, split pusher beside pendant, polished silver cuvette with engraved monogram AE, case back interior with Breguet maker’s mark B beneath a hairspring in lozenge-shaped cartouche, case back and cuvette numbered 3704, back, cuvette, inner rim, pendant and bow with French crab assay mark

Measurements

diameter 53.3mm

depth 16mm

weight 110.2g

Accompaniments

with original large brown leather covered Breguet presentation case, the lid with impressed initials A.E., green velvet lined fitted interior for the watch with additional shallower recess containing removable pad, green silk lined lid with gilt lettering reading Breguet 28, Place Vendome, Paris. The base of the box with impressed gilt lettering, the Breguet signature and address repeated and numbered No. 3704, and a Breguet 250^th anniversary certificate