Swiss gold skeletonized watch with chronograph Circa 1980

Gold skeletonized open faced watch
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A very fine 18 Carat yellow gold Swiss, a keyless, skeletonized pocket watch with chronograph and register, circa 1980. Retailed by Tourneau. A solid, polished case with an onyx set winding crown. Transparent dial with matte silver subsidiary seconds and 30 minute register ring dials. Black bâton hands. A gilt brass movement, skeletonized and hand-engraved, 21 jewels, straight-line lever escapement, monometallic balance, self-compensating Breguet balance spring. Case and movement signed.
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Diameter: 51 mm
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Signed: Gérald Genta  Swiss