French skeletonized quarter repeating silver verge Circa 1820

Very rare silver double skeletonized quarter repeating verge watch
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A rare French both sides skeletonized quarter repeating verge in a gold open faced case, circa 1820. Full plate gilt fusee movement, both plates pierced and engraved revealing the trains, polished steel endstone, plain three armed copper balance, engraved cock with polished steel coqueret with blue steel spiral hairspring, push pendant quarter repeating on two steel gongs, polished steel repeating work visible through the centre of the signed white enamel ring dial and trough the back. Black Arabic numerals, fine blue steel hands. Glazed movement cover.
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Diameter: 61 mm
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Weight: 116 g
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Signed: No Name
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Small hairlines.
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Reference 015000