Fine, rare Swiss open faced quarter repeating verge Circa 1840

Gold, enamel and pearl-set repeating watch by Roux Bordier & Cie
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A fine and rare Swiss gold, enamel and pearl set open faced quarter repeating key-wound verge pocket watch, circa 1840. Verge movement, chain fusée, repeating on two hammers onto a bell, key-winding. White enamel dial with Arabic numerals. Case with pearl set bezels, the reverse with a painted polychrome enamel scene of a mother and her children on translucent blue enamel engine turned ground, repeating through the pendant, together with a gilt chased protecting outer case with glazed back. Dial and movement signed.
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Diameter: 45 mm
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Signed: Roux Bordier & Cie