Unique Swiss gold and diamond-set dress watch Circa 1986

Unique Swiss gold and diamond-set four time zone watch
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A unique Swiss yellow gold and diamond-set four time zone dress watch, circa 1986, 4 quartz movements.
Silver patterned dial decorated with the map of Europe and Africa finely set with diamonds, back: silver patterned dial decorated with the map of North and South America finely set with white and yellow diamonds, 3 time zone indication, 18k yellow gold case, bezel finely set with diamonds, case signed.
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Diameter: 50 mm
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Signed: Gübelin