Rare Swiss gilt metal pair cased atronomical verge Circa 1660

Astronomical watch by Louis Prevost
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A rare and early Swiss gilt metal pair cased astronomical verge watch, circa 1660. Gilt finished verge movement, chain fusée, pierced and engraved scroll and foliage decorated balance cock and foot, large three armed balance, vase shaped pillars. Chased gilt dial, three subsidiary dials with engraved silver rings, blued steel index pointers and centred by rosettes, indicating lunar age with inner revolving engraved star and moon phase disc, date and time, three apertures for the signs of the zodiac, times of the day, days of the month and corresponding season. Plain inner case, finely engraved scroll and foliage decorated outer case. Movement signed.
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Diameter: 49 mm/incl. outer case 57 mm
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Signed: Louis Prevost