Swiss silver watch with split-second chronograph Circa 1930

Silver lever with tachometer and telemeter
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A Swiss silver pocket watch with coaxial button split-second chronograph, tachometer and telemeter, circa 1930. A polished case, hinged case back and cuvette, coaxial button in the crown for the start/stop and return to zero of the chronograph, button for the split-seconds at 11. Satine silver dial with painted Breguet numerals, outer 1/5th seconds track with Arabic five minute/second markers, most outer red telemeter scale, concentric spiral tachometer scale, subsidiary dials for the seconds at 6 and 30-minute register at 12 and blued steel Breguet hands. Rhodium plated movement, 17 jewels, straight-line lever escapement, cut bimetallic compensation balance, blued steel Breguet balance spring, index regulator. Dial, case and movement signed.
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Diameter: 53 mm
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Signed: James Schulz  Genève
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The case is slightly scratched and the hands are partially replaced.