Swiss gold repeater made for the English market Circa 1900

Gold lever with chronograph and 30-minute register
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A fine Swiss 18K yellow gold minute repeating keyless pocket watch with a chronograph and instantaneous 30-minute register, circa 1900. Made for the English market.
A polished case, a co-axial button in the crown for the start/stop and return-to-zero functions of the chronograph and a hinged gold cuvette. White enamel dial with radial Roman numerals, outer minute track with Arabic numerals at 5-minute intervals and 1/5th of a seconds divisions, subsidiary seconds and 30-minute register and blued steel spade hands. Frosted gilt movement, 17 jewels, three-quarter plate, jewelled to the third wheel, lateral lever escapement, cut bimetallic compensation balance, blued steel Breguet balance spring with overcoil, index regulator, repeating on gongs activated by a slide on the band, chronograph work on the dial plate. Case numbered.
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Diameter: 53 mm
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Signed: No Name