A. Lange & Söhne 1815 CHRONOGRAPH Special Boutique Edition (Ref. 414.026)

To be unveiled at Watches & Wonders 2015 haute horlogerie exhibition in Honk Kong, the new 1815 CHRONOGRAPH boutique edition boasts an exclusive case-and-dial combination. This special white gold model features blue numerals and a pulsometer scale. It is available only in the 16 A. Lange & Söhne boutiques worldwide.

Since 2010, the 1815 CHRONOGRAPH has been a paragon of classic design combined with advanced technology. With its Arabic numerals and railway-track minute scale, the dial recalls the charisma of A. Lange & Söhne’s coveted pocket watches. Paying tribute to the 200th birthday of Ferdinand Adolph Lange, who transformed Saxony into a centre of precision watchmaking in the 19th century, the eminent manufactory now presents a special edition of the 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 beatsper 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 L951.5 chronograph calibre is controlled by a column wheel, equipped with a snail for the precisely jumping minute counter and features a convenient flyback function. It 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.

Technical details
Model: 1815 CHRONOGRAPH  Ref. 414.026

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
Diameter: 30.6 millimetres; height: 6.1 millimetres
Movement parts: 306
Jewels: 34
Screwed gold chatons: 4
Escapement: Lever escapement
Oscillator: Shock-resistant balance wheel with eccentric poising weights; balance spring manufactured in-house with a frequency of 18,000 semi-oscillations per hour, precision beat-adjustment system with lateral set screw and whiplash spring
Power reserve: 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

Operating elements
Crown for winding the watch and setting the time, two pushers for operating the chronograph

White gold
Diameter: 39.5 millimetres; height: 11.0 millimetres
Crystal and back: Sapphire crystal (Mohs hardness 9)

Solid silver, argenté
Hands: Hours and minutes in rhodiumed gold; seconds, chronometer sweep seconds and minute counter in blued steel

Hand-stitched alligator leather strap, dark blue
Buckle: White-gold prong buckle

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