A. Lange & Söhne Datograph UP/DOWN 'Lumen' Limited Edition

A Lange & Söhne's latest Datograph model reliably tells the time around the clock, and its stop function can be used at any time as well Indications are legible even in darkness,all thanks to its semi-transparent dial and luminous displays The chronograph with a flyback function has a precisely jumping minute counter and a power-reserve indicator all of which come in a limited edition of 200 watches.

The round the clock display, which glows in the darkness with a distinctive green hue that the human eye perceives as soothing, is achieved by the hour and minute hands being filled with luminous material; the chronograph sweep seconds hand is fully coated with the compound The second's hand and minute counter in blued steel revolve above subsidiary dials that are luminous too The Datograph UP/DOWN "Lumen" is the fourth model of the "Lumen" series that A.

Lange & Söhne originally launched in 2010 Lange's proprietary cam-poised balance wheel, paired with a freely oscillating Lange hairspring, beats at a frequency of 18,000 semi-oscillations per hour. . Source