Rare Danish gold quarter repeating pocket watch Circa 1800

Gold repeater with double duplex 
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An early and very rare Danish 18k yellow gold quarter repeating pocket watch with a double duplex, circa 1800. Accompanied by an invoice from Beyer Zurich dated 1978.
A reeded bezel and band, engine-turned back with reeded border, hinged gold cuvette and a gilt dust cover. Enamel dial with radial Roman numerals, outer minute track and blued steel Breguet hands. Matte gilt full-plate movement, turned cylindrical pillars, fusee and chain with maintaining power, jewelled duplex escapement, three-arm gold balance, flat balance spring, diamond endstone, index regulator.
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Diameter: 58 mm
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Thickness: 22 mm
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Signed: Urban Jurgensen  Copenhagen
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Some damage on the dial.