A. Lange & Söhne GRAND LANGE 1 MOON PHASE

The new GRAND LANGE 1 MOON PHASE from Saxon manufactory gives the moon-phase display, which, by the way, is designed to remain accurate for 122.6 years, distinctive prominence on the dial. A patented coating process for the lunar disc endows this astronomical complication with a remarkably lifelike appearance.

Since its restart, the manufactory in Saxony has presented twelve models with this complication. But never before has the moon phase been as prominently showcased as in the new GRAND LANGE 1 MOON PHASE. A spacious stage has been reserved for the popular astronomical indication on the dial. It provides vividly realistic proof of how closely the moon-phase display tracks the actual orbit of our planet’s companion. This is because the display is connected with the hour-wheel continuum. As a result, it is constantly in motion, just like the moon itself. The increments are so small they cannot be detected by the naked eye.

Additionally, the moon-phase display indicates the time that elapses from new moon to new moon with an accuracy of 99.9978 per cent. The average synodic month lasts 29 days, 12 hours, 44 minutes, and 3 seconds. For the sake of simplicity, most classic moon-phase displays round this cycle down to 29.5 days. The resulting deviation of 44 minutes and 3 seconds per lunation adds up to one day in merely two and a half years. The much more precisely calculated seven-gear transmission of the GRAND LANGE 1 MOON PHASE reduces the deviation per cycle to less than one minute. Once correctly set, and assuming that the watch runs continuously, the display would only have to be corrected by one day every 122.6 years. Moreover, the display can be adjusted separately by using the push piece embedded in the case flank between 7 and 8 o’clock, for instance if the watch has not been wound up for a longer period of time.

The effort invested in the coating of the solid-gold lunar disc exemplifies the degree of perfection to which Lange’s product developers are committed. Their goal was to depict the nocturnal sky as magnificently as possible. The result of their intensive research and development work is a patented coating process, which, with its incomparably brilliant colours and crisp texture details, fulfils even the most ambitious aesthetic expectations. Interference effects – the superposition of waves – eliminate all non-blue hues of light falling on the watch. This creates an intense blue tone for the eye of the observer. A laser is used to cut out more than 300 stars of different sizes with extremely sharp contours, producing a miniaturised image of the galaxy.

Combining an off-centre dial, the outsize date and a lavishly finished manufacture calibre, the GRAND LANGE 1 MOON PHASE features all of the iconic hallmarks of A. Lange & Söhne’s most famous timepiece family. The considerable 72-hour power reserve was achieved with only one mainspring barrel. This is why the height of the movement is a scant 4.7 millimetres. The case in yellow gold, pink gold or platinum has a diameter of 41.0 millimetres. Endowed with a classic screw balance, a balance spring developed and manufactured in-house, a three-quarter plate made of untreated German silver, and lavishly hand-decorated movement parts, the Lange manufacture calibre L095.3 unites all of the classic features that prompt connoisseurs around the world to associate A. Lange & Söhne timepieces with Saxon watchmaking artistry and superior precision.

Technical details

Movement
Lange manufacture calibre L095.3, manually wound, crafted to the most exacting Lange quality standards, decorated and as-sembled by hand; precision-adjusted in five positions; plates and bridges made of untreated German silver; balance cock engraved by hand
Movement parts: 446
Jewels: 45
Screwed gold chatons: 7
Escapement: Lever escapement
Oscillator: Shock-resistant screw balance; superior-quality balance spring manufactured in-house, frequency 21,600 semi-oscillations per hour; precision beat adjustment system with lateral setscrew and whiplash spring
Power reserve: 72 hours when fully wound

Functions
Time indicated in hours, minutes, and subsidiary seconds with stop seconds; power-reserve indicator; outsize date; moon-phase display

Operating elements
Crown for winding the watch and setting the time, one push piece for quick outsize date corrections, recessed push piece for correcting the moon-phase display

Crystal and back: Sapphire crystal (hardness 9)

References
139.021: Yellow gold case, Solid silver, champagne dial, yellow gold hands
139.032: Pink gold case, Solid silver, argenté dial, pink gold hands
139.025: Platinum case, Solid silver, rhodié dial, rhodiumed gold hands

Straps
Yellow gold model: Hand-stitched crocodile strap in middle brown and Lange prong buckle in yellow gold
Pink gold model: Hand-stitched crocodile strap in reddish-brown and Lange prong buckle in pink gold
Platinum model: Hand-stitched crocodile strap in black and Lange prong buckle in platinum

Dimensions
Case: Diameter: 41.0 millimetres; height: 9.5 millimetres
Movement: Diameter: 34.1 millimetres; height: 4.7 millimetres

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