Monday, November 28, 2016

A. Lange & Söhne – DATOGRAPH Perpetual Tourbillon Edition

A. Lange & SöhneSAXONIA DATOGRAPH Perpetual Tourbillon Limited Edition

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Worth a closer look


The first of the new DATOGRAPH PERPETUAL TOURBILLON watches – of which there are just 100 – have now been dispatched. The watch does exactly what its name suggests, combining a perpetual calendar with a flyback chronograph and a tourbillon in an absolutely unique way.

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Since 2006 the name DATOGRAPH PERPETUAL has stood for the ingenious combination of flyback chronograph and perpetual calendar. Ten years on, this fascinating timepiece is now available with an added tourbillon – although at first glance, the only clue is in the name on the dial. That is because the tourbillon can only be seen by looking through the sapphire-crystal caseback.

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For the watchmakers, integrating this popular mechanism into this exclusive timepiece was a much more challenging task than might be expected. That is because the 729-part calibre L952.2 movement was not simply constructed module by module. Instead, A. Lange & Söhne decided on a more elegant but more complicated solution: within the movement, which was rebuilt from scratch, the three complications that give the watch its name were all connected to form an integrated whole.

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The chronograph is equipped with a column-wheel mechanism, a precise jumping minute counter and a flyback function. The jumping perpetual calendar is paired with a moon-phase display and a Lange outsize date.

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And a glance through the sapphire-crystal caseback into the movement – hand-decorated in accordance with the highest Lange standards – makes it clear how the chronograph mechanism was arranged around the tourbillon. Thanks to the patented stop-seconds mechanism, the balance wheel is momentarily brought to a standstill when the crown is pulled, so that the watch can be set with one-second accuracy.

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The sophisticated nature of the watch's construction is also reflected in its design: the clearly structured black dial of this model – which is limited to just 100 watches – is easy to read despite the density of information it displays.

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Technical Specifications

Model: Saxonia DATOGRAPH Perpetual Tourbillon Platinum
Reference №: 740.036

Limited Edition100 watches.

Lange manufacture calibre L952.2;
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
Movement measures
Diameter: 32.6 millimetres; height: 9.0 millimetres
Movement parts: 729
Bearing jewels: 59
Screwed gold chatons: 5, including one diamond endstone
Escapement: Lever escapement
Shock-resistant balance with eccentric poising weights, balance spring manufactured in-house with a frequency of 18,000 semi-oscillations per hour
Power reserve: 50 hours when fully wound
Hours and minutes; subsidiary seconds dial; Tourbillon with patented stop-seconds;
Chronograph with flyback and precisely jumping minute counter;
Perpetual calendar with outsize date, day of week, month and leap-year display;
Moon-phase display; day/night indicator;
Power-reserve indicator; 50 hours power reserve
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
Diameter: 41.5 millimetres;
Height: 14.6 millimetres
Crystal and back: Sapphire crystal (Mohs hardness 9)
Dial  Black
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  rhodiumed gold
Hand-stitched alligator leather strap, black
Lange prong buckle

Contact information for the media
Arnd Einhorn, Director Press and PR
* Tel.: +49 (0)35053 44-5505
* E-mail:
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