Fine Swiss 18 carat gold complicated lever watch Circa 1900

A very fine Swiss 18K yellow gold, astronomical, hunting cased, minute repeating keyless pocket watch with perpetual calendar, chronograph and phases and age of the moon, circa 1900.
Straight line lever escapement, cut bimetallic compensation balance, blued steel Breguet balance spring, swan-neck micrometer regulator, steel chronograph work activated by olive shaped button in the band, repeating with two hammers on two gongs via activating slide in the band.

Polished gold case, sprung and hinged front cover with intricate cipher DONZEL, interior with dedication inscription. Hinged gold cuvette.
White enamel, Roman numerals, outer minute and seconds divisions and Arabic five seconds numerals, sunk subsidiary four year dial divided into four sectors each with month indications from January-December, sunk subsidiary date and day of the week dials, seconds with age of the moon, aperture for phases ofthe moon, setting levers in the bezel. Gold Louis XV hands. Case stamped with two interlaced Gs in a shield.
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