Omega / Kirby Beard & Co. Ld., "Cadran" Breveté S.G.D.G., 57 mm, 146 g, circa 1905
A gentleman's rare double-sided pocket watch with chronograph and polychrome S.G.D.G. dial and tachy scale - with original box Case: silver, polished. Dial: front: enamel, Arabic numerals, 15 min. counter, concentric tachy scale, spade hands. Back: outer tachy scale and 15 min. counter, skeletonized centre, blued single spade hand. Movm.: 3/4 plate movement, frosted, gilt, very finely ground chronograph steel parts, ratchet wheel, screw compensation balance, index spring fine adjusting device.
S.G.D.G. Tachymeter Dial The tachymeter dial allows the measuring of any speed between 10.5 and 140 miles per hour without the help of calculations. 15-minute counters starting with 5 individual minute segments in different colours to indicate which colour will show the speed on the spiral tachymeter scale. Source: Marco Richon "Omega", 2007, p. 520-523
Estimate 4,500 - 5,500 €
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