Under the magnifying glass
This heading presents one brand or model in more detail.

At present: The Langematik Perpetual /Lange & Söhne
Others "Under the magnifying glass"

Already available:
Star Caliber 2000 of Patek Philippe
Langematik-Perpétuelle / Lange & Söhne
Opus V of Harry Winston
Opus 7 of Harry Winston
Opus 9 of Harry Winston
Louis Moinet
Concord C1 Tourbillon
Concord C1 QuantumGravity
Girard Perregaux
Carl F. Bucherer
La Machine à Ecrire le Temps

Gallery-Main page
Gallery-Lange page
Contents
The Langematik Perpetual /Lange & Söhne

 

The Langematik Perpetual:

Reference 310.025 in platinum, Reference 310.021 in yellow gold
Movement: Cal. L922.1 SAX-0-MAT Self-winding, bidirectional rotor in 21-carat gold and platinum
Automatic zero-reset mechanism and additional 24-hour display with day/night indication, perpetual calendar with outsize date, day-of-week, month, leap-year and moon-phase display
Case: Platinum or 18-carat yellow gold
One main push-piece and three individual push-pieces recessed in the case
Sapphire-crystal glass and caseback
Hand-stitched crocodile strap with solid platinum or gold buckle
Dial: Solid silver with luminous round markers
Hands: Rhodiumed gold or yellow gold, luminous

 

The winding, reversing and reduction gear train of the Lange Calibre L922.1 SAX-0-MAT.
The bidirectional rotor of the SAX-0-MAT revolves in ball bearings and is additionally secured in an adjustable jewelled counterbearing to assure perfect planarity.
Together. the four precision ball bearings minimise friction losses in the winding train.

Simplified view showing the functional principle of the perpetual calendar in the LANGEMAT1K PERPETUAL.
The duration of each month in the four-year cycle, including the leap-year correction (29 February) is sampled from the 48-step program disc and transmitted to the complex calendar mechanism.


The patented time-setting mechanism which automatically moves the seconds hand to the 12 o'clock position (zero-reset).
Principle: When the crown is pulled, three springs trigger the motion of the "zero-reset" mechanism.
The springs are retensioned every time the crown is pushed home to restart the movement.

Gallery-Main page
Gallery-Lange page
Contents