French silver oignon watch with single hand and alarm Circa 1690

Oignon watch with verge escapement
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A fine and early, large silver oignon watch with single hand and alarm, circa 1690. The case has a deep back, pierced and engraved band decorated with inhabited foliage and a winged cherub, split bezel, polished back, and loose ring pendant. Silver dial, champlevé radial Roman numerals on matted background, half hour divisions, inner revolving alarm disc with Arabic numerals and steel hour pointer. Single blued steel alarm setting hand.
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A gilt brass movement, full plate with vase pillars, fusee and chain, verge escapement with large steel three arm asymmetrical spokes to give room for the winding arbour, short flat balance spring, gilt brass Louis XIV balance cock, pierced and engraved with foliage and birds, Tompion type rack and pinion regulator with silver dial, alarm with fixed pierced and engraved brass barrel, steel train, a single hammer striking a bell fixed inside the back of the case.
Movement signed.
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Diameter: 60 mm
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Signed: Dumergue  Angoulesme
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The movement is oxidized.