French oignon clockwatch with mock pendulum Circa 1720

Silver striking verge with mock pendulum by Cogniet
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A large, very fine and very rare French silver open faced two train mock pendulum Louis XV oignon clockwatch striking the hours and half hours, circa 1720. Frosted gilt full plate movement, divided Egyptian pillars, fusee and chain, click and pawl set up, verge escapement, steel balance with mock pendulum, chased cock decorated with symmetrical foliage and strapwork and with aperture for the mock pendulum, concealed Tompion type regulator with silver scale disc, striking train with engraved gilt standing barrel, fine steel foliate pieced striking gate, striking the hours and half hours with a single hammer on a bell in the back of the case. White enamel dial with black Roman numerals, inner quarter hour ring, outer minute track with Arabic five minute numerals and original steel beetle and poker hands. The deep case back decorated with concentric rings, pierced stylised scroll border, pierced foliate band beneath the bezel, polished bezel, square hinge, loose ring pendant. Movement signed.
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Diameter: 64 mm
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Signed: Cogniet à Paris