The DATOGRAPH UP/DOWN “Lumen” is the fourth model of the “Lumen” series that A. Lange & Söhne launched in 2010. Its semi-transparent dial and luminous coatings assure that all features can also be used in the dark: the time indication, the outsize date, the chronograph functions and the power-reserve indicator. The flyback chronograph with the precisely jumping minute counter comes in a limited edition of 200 watches in platinum.
Even in the dark, the displays are clearly legible because the three central hands as well as the applied arrow marker of the power-reserve indicator are coated with a luminous compound. The seconds and minute-counter hands in blued steel each revolve in front of a phosphorescent subsidiary dial. The display surfaces of the outsize date also glow with a green hue perceived as pleasant by the human eye. For the first time in a Lange watch, the inner dial ring with the minute scale is luminous as well.
1 Model of the DATOGRAPH UP/DOWN "Lumen"
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46
4
60 hours when fully wound
Frequency: 18000 semi-oscillations per hour
Beat-adjustment system: Screw balance
Diameter: 30.6 mm; height: 8.1 mm
