Swiss gold doctor’s pocket watch with chronograph Circa 1930

Gold Rolex watch with register and pulsometer
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A very fine and extremely rare Swiss, 18K yellow gold doctor’s pocket watch with chronograph, register and pulsometer, circa 1930. Two-tone silver dial with black painted baton indexes and Arabic 3 & 9, outer minute and fifths of second divisions, Arabic five minute/second numerals, outermost blue pulsometer scale, subsidiary dials for the seconds and 30-minute register. Blued steel baton hands. A rhodium-plated movement, 17 jewels, straight-line lever escapement, monometallic balance, self-compensating Breguet balance spring, index regulator. Dial, case and movement signed.
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Diameter: 43 mm
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Signed: Rolex  Swiss