Swiss 18k gold of two open faced keyless watch Circa 1900

Two gold lever pocket watches
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A group of two open faced keyless watch with enamel dial, circa 1900.The first: manual winding movement,  white enamel dial, Roman numerals, outer minute track, 18k pink gold hinged case and cuvette, engine-turned case back, dial, case and cuvette signed; case, movement and cuvette numbered, the second: manual winding movement, white enamel dial, Arabic numerals, subsidiary seconds, outer minute track, 18k yellow gold hinged case and cuvette, dial, cuvette and movement signed; case and cuvette numbered.
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Diameter: 48 x 27 mm
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Signed:  Patek Philippe & Vacheron Constantin  Geneve
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Accompanied by a Patek Philippe Extract from the Archives.