A. Lange & Söhne’s Grand Lange 1 Moon Phase “Lumen”, Presented by the Director of Product Development (Video)

Having already looked at the Datograph Pepretual Tourbillon last week, we will look at the another big highlight from the A. Lange & Söhne 2016 collection, the Grand Lange 1 Moon Phase “Lumen.”  I’ll start off with some background and images, and then down the page is the excellent video presentation of this watch by A. Lane & Söhne Director of Product Development Anthony de Haas.  Enjoy

A. Lange & Söhne Grand Lange 1 Moon Phase “Lumen”

limited edition of 200 watches

41mm platinum case

In 2013, A. Lange & Söhne introduced the Grande Lange 1 “Lumen”, a watch with a semi-transparent sapphire-crystal dial that exposes the disc configuration of the Lange outsize date.  It was followed a year later by the Grand Lange 1 Moon Phase with a prominent and highly accurate in-dial moon-phase display (reproducing the lunar month with an accuracy of 99.998%).



Now, the Grand Lange 1 Moon Phase “Lumen” brings the best of both pieces together into one watch.


The dial is made of blackened silver with a black-tinted, semi-transparent sapphire-crystal glass.  Essentially the inverse of UV-blocking sunglasses, the special coating applied to the glass blocks most visible light but not the UV spectra.  Which thus allows the luminous pigments on the outsize-date mechanism to still glow in the dark. The tens cross is coated with a white luminous compound and printed with black numerals. Conversely, the units disc, also featuring black numerals, is made of transparent glass and rotates in front of the luminous background of the date aperture

As Director of Product Development Anthony de Haas explains in the below video, this model is different from Lange’s previous moon-phase models with solid-gold lunar discs; instead, the the Grand Lange 1 Moon Phase Lumen has a disc made of glass. Initially, its surface is treated with a patented coating process. In a second step, a laser is used to cut out 1164 stars and the moon.  Luminous compound behind the lunar disc brings them to life.

The manually wound calibre L095.4 is elaborately finished and of the classical A. Lange style, as one would expect.  The gorgeous three-quarter plate made of untreated German silver is decorated with striping (“Glashütte ribbing” they call it, as opposed to “Côtes de Genève” or“Geneva striping”).  Other classical Lange elements include the use of screwed gold chatons, and a screwed balance with a free-sprung balance spring (made in-house).

A. Lange Caliber L095.4

manual wind, 72 hrs power reserve

The A. Lange & Söhne Grand Lange Moon Phase Lumen watch is priced at €69,600.  Limited edition 200 pieces.