Tuesday, January 20, 2015

A. Lange & Söhne Datograph Perpetual (Ref. 410.038), White Gold Case with Grey Dial

Unveiled at SIHH 2015, A. Lange & Söhne’s latest Datograph Perpetual model offers a stunning combination of Chronograph and perpetual calendar with a noble white-gold/grey contrast. The pairing of a solid white-gold case with a grey dial adds elegance and charisma to the iconic DATOGRAPH PERPETUAL timepiece, which has been a synonym for the ingenious combination of a fly-back chronograph and a perpetual calendar since 2006.
With three highly elaborate, technically advanced mechanisms, it fully lives up to the task of precise short-time measurements: The column-wheel concept assures dependable control of all chronograph functions, the jumping minute counter always delivers distinct legibility of stopped times and the fly-back system makes it possible to accurately measure the durations of events in quick succession.
With its Lange outsize date, day of week, month and leap year indications, the perpetual calendar is so precise that it requires no adjustment until the year 2100, when a one-day correction is needed.
All calendar displays can be advanced simultaneously with a convenient rapid-correction pusher. Additionally, three recessed correctors allow the displays to be adjusted separately.
The dark grey hue of the dial clearly emphasises the displays and prominently showcases the deep blue lunar disc with its golden stars. Baton hour markers as well as hour and minute hands in rhodiumed gold highlight the rich-contrast design that was first introduced with the 2010 launch of the pink-gold version.  The chronograph hand indicates the stopped time to one-fifth of a second. It is made of blued steel. The same material was chosen for the minute counter and seconds hands, allowing them to stand out prominently against the bright rhodié background of the subsidiary dials.
With its movement consisting of 556 lavishly finished parts, it delivers fresh proof of the Saxon manufactory’s virtuosity in the realm of horological complications.
Technical details
Model: Datograph Perpetual (Ref. 410.038)

Movement 
Lange manufacture calibre L952.1; 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: 32.0 millimetres; height: 8.0 millimetres
Movement parts: 556
Bearing jewels: 45
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 setscrew and whiplash spring
Power reserve: 36 hours when fully wound

Functions
Time indicated in hours, minutes and subsidiary seconds with stop seconds
Fly-back chronograph with precisely jumping minute counter
Tachymeter scale
Perpetual calendar with date, day of week, month, moon phases and leap year
Day/night indication

Operating elements 
Crown for winding the watch and setting the time, two pushers for operating the chronograph, rapid-correction pusher for collectively advancing all calendar displays, one recessed corrector each for adjusting the day of the week, the month and the moon phases

Case 
White gold
Diameter: 41.0 millimetres; height: 13.5 millimetres
Crystal and back: Sapphire crystal (Mohs hardness 9)

Dial 
Solid silver, grey; subsidiary dials rhodié
Hands: Hour and minute hands in rhodiumed gold, luminous; day, month and four-year hands in rhodiumed gold; chronograph sweep seconds hand, subsidiary seconds hand and minute counter hand in blued steel

Strap 
Hand-stitched alligator leather strap, black
Buckle: Lange prong buckle in white gold

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