Small Swiss 18K gold open faced ladies pocket watch Circa 1910

Gold miniature watch by Vacheron & Constantin
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A very fine, Swiss gold miniature ladies pendant watch, made for Bigelow Kennard & Co. Boston, circa 1910.
Fine miniature precision lever movement, completely numbered, Geneva stripes, adjusted in 7 layers, signed Vacheron & Constantin. Gold-plated dial, signed Bigelow Kennard & Co., with Breguet-style radial hours, outer minutes track, and  Breguet steel hands. Polished 18K gold case with monogram, case number 219605, and work number 352756.
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Diameter: 26 mm
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Weight: 17 g
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Signed: Vacheron & Constantin