Swiss 18k gold skeletonized keyless lever watch Circa 1989

Gold skeletonized lever watch
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A fine yellow gold skeletonized open faced keyless lever perpetual calendar watch with moon phases case, circa 1989. Finely engraved gilt lever movement, jewels, mono-metallic balance, skeletonized transparent dial, black Arabic numerals, blued steel hands, four subsidiary dials for the date, month combined with constant seconds, day and moon phases, 18k yellow gold case, sapphire crystal display back, case, dial and movement signed.
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Diameter: 50 mm
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Signed: IWC  Schaffhausen
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Accompanied by an IWC presentation box.
Property from a charitable trust.