Danish gold lever with phase and age of the moon Circa 1975

Gold watch with perpetual calendar
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A Danish 18K yellow gold keyless pocket watch with a perpetual calendar and phase and age of the moon, circa 1980. A polished case, correctors in the band, snap-on gold cuvette. Silver dial with radial Roman numerals on a silver reserve, engraved centre, outer minute divisions, subsidiary dials for the seconds, the date, days of the week and the months with four-year cycle, aperture for the moon phases concentric with seconds, the moon’s age at the edge and gold Breguet hands. Matte gilt movement (made circa 1910),  17 jewels, counterpoised straight-line lever escapement, cut bimetallic compensation balance with temperature and meantime adjustment screws, blued steel Breguet balance spring, index regulator. Dial, case and movement signed.
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Diameter: 52 mm
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Thickness: 12 mm
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Signed: Urban Jurgensen & Sonner  Copenhagen