The limited Grand Lange 1 "Lumen" by A. Lange & Sohn offers enlightenment: a semi-transparent dial exposes the ingenious mechanism of the first luminescent outsize date display.
When it was first presented, it evoked excitement and kicked off a trend that soon found many imitators: the Lange outsize date. Together with the asymmetric dial, it elevated the Lange 1 to the sratus of an icon of classic design.