French single-handed pre-balance spring pendant watch Circa 1650

Fire-gilded brass verge pendant watch by David du Chemin
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A French fire-gilded brass single-handed pre-balance spring pendant watch, circa 1650. Fire gilt full plate movement, gut and fusee, applied blued pierced click work, verge escapement, plain two-arm steel balance without balance spring. Fire gilt dial engraved with a flower decor, engraved hour chapter ring with Roman hours and a single blued hand. Engraved case, pendant ring. Movement signed.
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Diameter: 34 mm
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Weight: 42 g
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Signed: David du Chemin à Rouen