Swiss gold minute repeating open faced watch Circa 1888

Gold lever pocket watch
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A fine yellow gold open faced minute repeating perpetual calendar watch with moon phases, circa 1988. Finely engraved and chased gilt lever movement, highly jewelled, minute repeating on two gongs, silvered dial, painted black Roman, inner minute track, yellow gold baton hands, subsidiary dials indicating day, month combined with leap year indication, date and moon phases, triple-stepped bezels, sapphire-set crown and slide to band, triple-stepped arched bow, sapphire crystal display back, case, dial and movement signed.
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Diameter: 54 mm
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Signed: Gérald Genta
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Accompanied by the original retailer’s invoice dated July 8, 1988, for $144,000. Together with a presentation box with outer packaging.
Property  from a charitable trust