Important Modern & Vintage Timepieces

Geneva, Mar 16, 2014

LOT 292

OMEGA - 24 HOUR DAY AND NIGHT DIAL Omega, movement No. 6866361, case No. 4318372. Made circa 1910. Fine, rare and very unusual, silver, keyless pocket watch with 24-hour day and night dial to Swiss patent No. 30613, the hour hand making one full rotation in 24-hours.

Four-body, polished gilded bezel, band and border, the back cover engine-turned and with a central foliate cartouche. Hinged silver cuvette engraved with the prize medals. White enamel, the lower half in a darker tone to indicate the night- time hours, radial Arabic numerals 1-12 and 13-24, inner red supplementary numerals 1-12, outer minute track, subsidiary seconds. Blued steel Breguet hands. Cal. 19 LBTI, matte gilt, 15 jewels, straight line lever escapement, cut bimetallic compensation balance, blued steel Breguet balance spring with overcoil, index regulator.