Swiss yellow gold watch with chronograph and register Circa 1912

Gold open faced lever pocket watch
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A fine Swiss, 18K yellow gold, a keyless pocket watch with chronograph and 30-minute register, circa 1912. A solid, polished case, curved bezel, and chronograph button in the crown for the start/ stop and return-to-zero function of the chronograph. Hinged gold cuvette. White enamel dial with bold painted Roman numerals, outer minute and fifths of second chronograph divisions, Arabic five minute/ seconds numerals, subsidiary dials for the seconds and instantaneous 30-minute register. Yellow gold spade hands. A frosted gilt movement, 3/4-plate, 17 jewels, straight-line lever escapement, cut-bimetallic compensation balance with blued steel Breguet balance spring, index regulator movement signed B &Co.
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Diameter: 46 mm
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Signed: No Name