Perpetual calendar minute repeating chronograph Circa 1880

Gold perpetual calendar minute repeating chronograph watch with moon-phases
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An 18k yellow gold Swiss hunting cased perpetual calendar minute repeating chronograph watch with moon-phases, circa 1880, jeweled movement, two polished steel hammers minute repeating on coiled gongs, signed and numbered gold cuvette.
White enamel dial, Roman numerals, subsidiary dials for day, month in French combined with leap year indication, date and moon-phases combined with constant seconds, outer track calibrated for chronograph,
Polished case, chronograph pusher and repetition slide to the band.
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Diameter: 57 mm
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Signed: Mermod Frères