A. Lange & Söhne Saxonia Datograph Perpetual 410.030E White Gold Grey Dial

The Datograph Perpetual 410.030E, made from about 2009 to 2011, pairs a White Gold case with a Grey dial and silver subdials, and it uses Roman numerals, a detail that distinguishes it from the later White Gold version introduced in 2015 with baton markers. A. Lange & Söhne created the model by uniting the flyback Datograph of 1999 with a perpetual calendar.

On the Grey dial, the chronograph counters sit alongside indications for the day, month, leap year and moon phase, with a day/night display and the outsize date beneath 12 o'clock, the whole arranged with Lange's usual symmetry. The White Gold case measures 41 mm across and 13.5 mm high, and a sapphire back shows the hand-wound movement with its column wheel. It is worn on a black alligator strap with a White Gold buckle, complementing the cool Grey dial.