Inspired by a medical timepiece from the early 1920s, the Longines Pulsometer Chronograph measures not just time but heartbeats. The original model of this reissue was used as an instrument by the medical profession to calculate a patient’s heart rate reliably and quickly. The chronograph hand, coupled with the pulsometric scale, indicates the patient’s heart rate after 30 pulses. The Longines Pulsometer Chronograph offers sober elegance like the model that inspired it. The transparent steel case back with a diameter of 40mm reveals the minutiae of the column wheel movement produced exclusively for Longines.