It will be launched during the Watches & Wonders exhibition in Hongkong and only be available in one of the 15 A. Lange & Söhne boutiques worldwide.
The Saxon manufactory presents a special edition of the 1815 chronograph: In addition to deep-blue printed dial elements, the argenté-coloured face in solid silver features a pulsometer-scale at its periphery. It is used for heart-rate measurements. This is done by stopping the time while counting 30 heartbeats. Then, on the pulsometer-scale, the chronograph sweep-seconds hand provides a direct reading of the number of beats per minute. The hands reflect the colour combination of the dial: hours and minutes are indicated with rhodiumed-gold hands. The chronograph sweep-seconds, minute counter and subsidiary seconds hands are made of blued steel.
The A. Lange & Söhne 1815 Chronograph is powered by the L951.5 in-house chronograph calibre. The chronograph is controlled by a column wheel, equipped with a snail for the precisely jumping minute counter and features a convenient flyback function. The watch has a power reserve of 60 hours. A large balance wheel with eccentric poising weights driven by a freely oscillating hairspring crafted in-house assures excellent rate accuracy.
Lange manufacture calibre L951.5; manually wound, crafted to the most exacting Lange quality standards, decorated and assembled by hand; precision-adjusted in five positions; plates and bridges made of untreated German silver; balance cock engraved by hand
Screwed gold chatons
Shock-resistant balance wheel with eccentric poising weights; balance spring manufactured in-house with a frequency of 18,000 semi-oscillations per hour (= 2,5 Hz), precision beat-adjustment system with lateral set screw and whiplash spring
60 hours when fully wound
Time indicated in hours, minutes and subsidiary seconds with stop seconds; flyback chronograph with precisely jumping minute counter; pulsometer scale
Crown for winding the watch and setting the time, two pushers for operating the chronograph
Diameter: 39.5 millimetres; height: 11.0 millimetres
Diameter: 30.6 millimetres; height: 6.1 millimetres
Crystal and back
Sapphire crystal (Mohs hardness 9)
Solid silver, argenté
Hours and minutes in rhodiumed gold; seconds, chronometer sweep seconds and minute counter in blued steel
Hand-stitched alligator leather strap, dark blue
White-gold prong buckle