Swiss enamel and pearl set minute repeating watch Circa 1890

A gold, enamel and pearl-set  minute repeating centre seconds watch
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A rare Swiss gold, enamel and pearl-set keyless lever minute repeating centre seconds watch made for the Chinese market, circa 1890, nickel damascened lever movement, cut bimetallic balance, index regulator, two hammers striking on gongs for repeating mechanism.
White enamel dial, Roman and Arabic numerals, centre seconds indication, outer track for the minute graduation, 1/5th second and calibrated to 300 units, gold case decorated on both bezels with split pearls, back with a painted enamel bouquet of summer flowers on blue background, sliding device to the band for the minute repeating meachnism, stamped BHJ Co inside the case and numbered.
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Diameter: 50 mm
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Signed: No name