Swiss gold chronograph with pulsometer scale Circa 1924

Gold doctor’s watch
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A rare Swiss 18 carat yellow gold open faced chronograph keyless lever pocket watch with pulsometer made by Patek Philippe in Geneva, circa 1924. The manual winding jewelled nickel movement stamped with the seal of Geneva, a cut bimetallic compensation balance and moustache lever escapement. A gold cuvette. White enamel dial with Arabic hours, an outer minute and fifths of a second track with five minute numerals, a red pulsometer scale graduated to 30 pulsations, subsidiary seconds at 6 o’clock, 30 minute counter at 12 and blued steel spade hands. A polished case with monogrammed snap on back. Case, dial, movement and cuvette signed.
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Diameter: 51 mm
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Signed: Patek Philippe & Co Genève
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Comes with a Patek Philippe certificate of origin, an Extract from the Archives and the original presentation box.
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The present watch is a rare example featuring a dial specifically calibrated for pulsations. It is also called a ‘doctor’s watch’ due to the pulsation scale on the dial. The scales are calibrated to show heart rate after counting 30 pulses. This particular model was specially adjusted with a half chronometer balance to warrant further precision and accuracy in the watch.