SIHH 2019: A. Lange & Söhne Datograph Perpetual Tourbillon (Pictures and Price)
The unique combination of a flyback chronograph, a perpetual calendar with moonphases, a tourbillon with stop seconds, and a power-reserve indicator by A. Lange & Söhne presents itself in white gold for the first time, in this edition with a pink gold dial.
The name already suggests the immense technical potential offered by the Datograph Perpetual Tourbillon that was launched in 2016: The term Datograph refers to a flyback chronograph with a precisely jumping minute counter and the typical Lange outsize date. Perpetual stands for its perpetual calendar with precisely jumping displays combined with a moon-phase indication calculated to remain accurate for 122.6 years. Finally, the Tourbillon part alludes to the one-minute tourbillon with patented stop seconds that is visible on the caseback side; it eliminates the influence of gravity on the escapement inside its cage. The well-organised arrangement of the time, calendar and chronograph displays is rounded off with a power-reserve indicator at the end of the tachymeter scale.
A first 100-watch edition in platinum with a black dial is now followed by a second edition of 100 watches in white gold with a pink-gold dial. The new hue enriches the deliberately reduced spectrum of A. Lange & Söhne with a warmer nuance that creates a pleasant contrast to the cool charisma of the 41.5-millimetre white-gold case and the rhodiumed gold hands and appliques.
The development of the Datograph Perpetual Tourbillon is powered by an impres- sive success story that began with the presentation of the first Datograph in 1999. Its rare combination of a classic column-wheel design, a precisely jumping minute counter and the flyback function attracted considerable attention. The clearly structured dial layout, in which the Lange outsize date and the two subsidiary dials form an equilateral triangle, gave it the status of a timeless icon.
This prominent constellation is echoed by the Datograph Perpetual Tourbillon. Its larger diameter made it possible to enlarge the subsidiary dials that accom- modate the displays of the perpetual calendar. The subsidiary seconds, the day of the week and the day/night indicator are on the left side, while the precisely jumping minute counter, the months, and the leap-year indicator are on the right.
Three recessed correctors make it possible to adjust the moon phase, the day, and the month separately. A universal button at 10 o'clock advances all calendar displays collectively. The sapphire-crystal caseback reveals the L952.2 manufacture calibre that consists of 729 parts. Finished manually down to the last detail, its complexity reflects the ambition of A. Lange & Söhne to continue to redefine the limits of mechanical watchmaking.
A. Lange & Söhne Datograph Perpetual Tourbillon
Movement: 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; intermediate wheel cock and tourbillon bar engraved by hand
Movement parts: 729
No. of jewels: 59, including one diamond endstone
Screwed gold chatons: 5, including one diamond endstone
Escapement: Lever escapement
Oscillation system: Shock-resistant cam-poised balance wheel; balance spring manufactured in-house, frequency of 18,000 semi-oscillations per hour
Power reserve: 50 hours when fully wound
Functions: Time indicated in hours, minutes and seconds, tourbillon with patented stop seconds; flyback chronograph with precisely jumping minute counter; tachymeter scale; perpetual calendar with outsize date, day of week, month, leap year; day/night indicator; moon-phase display; power-reserve indicator
Operating elements: Crown for winding the watch and setting the time, two buttons for operating the chronograph, rapid-correction button for collectively advancing all calendar displays, one recessed corrector each for adjusting the day of the week, the month, and the moon phases
Case dimensions: Diameter: 41.5 millimetres; height: 14.6 millimetres
Movement dimensions: Diameter: 32.6 millimetres; height: 9.0 millimetres
Glass and caseback: Sapphire crystal (Mohs hardness 9)
Case: White gold
Dial: Solid pink gold
Hands: Hour and minute hands in rhodiumed gold, luminous; day, month, and four-year hands in rhodiumed gold; seconds hand, minute counter hand and chronograph hand in blued steel
Strap: Hand-stitched alligator leather, dark brown
Buckle: Deployant buckle in white gold
Limited edition: 100 watches
The price for the A. Lange & Söhne Datograph Perpetual Tourbillon is EURO 285,000.