Skeletonized Swiss gold, diamond-set dress watch Circa 1985

Gold and diamond-set keyless lever by Longines
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A very fine, rare and thin, skeletonized Swiss 18 carat gold and diamond-set keyless lever dress watch with a gold box-link chain, made in the 1980s. Skeletonized movement, hand-engraved gilt, 12 jewels, straight-line lever escapement, monometallic balance, self-compensating blued steel Breguet balance spring, shock absorber. Frosted gold dial, annular, painted Roman numerals, subsidiary seconds and original gold dauphine hands. Case glazed on both sides, polished bezels, textured band and bow, set on both sides with 105 graduated round diamonds.  Dial signed.
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Diameter: 48 mm
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Signed: Longines Swiss made