Swiss gunmetal double dial tachymeter chronograph Circa 1906

Rare double dial tachymeter chronograph by Omega
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A rare Swiss gunmetal open face double dial tachymeter chronograph by Omega, circa 1906. Retailed by Kirby Beard & Co. Ltd., Paris. Gilt ¾ plate movement, lever escapement, bimetallic balance, overcoiled spring, visible chronograph work planted on back plate activated by single button in crown. White enamel dial. To the front a color coded six segment tachymeter scale for speeds 10½ to 250 km/hr, Arabic chapters, 15 minute register incorporating segment counter, gold hour and minute hands, blued sweep second hand, annular a tachymeter scale for speeds 7 to 180 km/hr, fifth seconds ring and blued sweep second hand. Plain open face case with gilt accents, doubly glazed.
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Diameter: 57 mm
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Signed: Omega Kirby Beard & Co. LD. Cadran Brevete S.G.D.G.
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An example of this reference is illustrated in ‘Omega: A Journey Through Time’ by Marco Richon.