SIHH 2014: A. Lange Lange 1 Tourbillon Perpetual Calendar Pink Gold
by Kyle Stults on January 21, 2014

A. Lange Lange 1 Tourbillon Perpetual Calendar Pink Gold Beauty Shot

A. Lange & Soehne’s Lange 1 Tourbillon Perpetual Calendar combines two classic complications with the iconic design of A. Lange & Söhne’s most famous watch family.  This is not a new model, but a new metal offering — pink gold.  Configured around the time indication, the calendar displays and the peripheral month ring deliver full time and date readings at a single glance.   All of the perpetual calendar displays advance instantaneously (date, day of the week, month, leap year, and moon phase) – further, the mechanism is designed in such a way that it must be adjusted by just one day in the year 2100.   And the moon-phase display will even run true for 122.6 years before it needs to be corrected.

A. Lange Lange 1 Tourbillon Perpetual Calendar

41.9mm x 12.2mm pink gold case

 A. Lange Lange 1 Tourbillon Perpetual Calendar Pink Gold

automatic mechanical Lange Cal L082.1 (plates and bridges made of untreated German silver; intermediate-wheel and tourbillon cocks engraved by hand)

A Lange Caliber L082-1

A Lange Caliber L082-1 dial side detail

You can see here the central element of the unidirectional winding rotor is lavishly decorated and in 21-carat gold, and the thin centrifugal mass on the edge is platinum

 A Lange Caliber L082-1 rotor detail

Only a modest inscription beneath the 12 refers to the existence of the tourbillon. But a glance through the sapphire-crystal caseback reveals its technical inge-nuity. The patented stop-seconds mechanism instantaneously brings the balance inside the tourbillon cage to a standstill when the crown is pulled. This allows the watch to be set with one-second accuracy. The upper part of the tourbillon cage is decorated with black polish, no doubt the most sophisticated and time-consuming type of artisanal finis-sage. The bearing of the tourbillon cage features a diamond endstone as a reminiscence of the historic 1A pocket watches of the venerable A. Lange & Söhne brand.