French gilt metal and rock crystal verge watch Circa 1640

Pre-balance Spring Verge by Henry Gebhart
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A rare and early French gilt metal and rock crystal per-balance spring verge watch, circa 1640. Gilt finished verge movement, early chain fusée, finely pierced and engraved balance cock and foot with foliage decoration, steel two armed pre hairspring balance wheel, worm set up with blued steel decorative mounts, silver regulator disc. Silver dial, engraved and blackened Roman numerals and single-blued steel tulip hand. Scalloped gilt metal and rock crystal case, gilt metal engraved, stepped and scalloped bezel, domed scalloped crystal, gilt metal ring pendant and seven-piece hinged. Movement signed.
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Diameter: 37 mm
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Signed: Henry Gebhart à Strasbourg