The Datograph Perpetual juxtaposes a white-gold case and a grey dial. Since 2006, its name has been a synonym for the ingenious combination of a flyback chronograph and a perpetual calendar. With three highly elaborate mechanisms, it fully lives up to the task of precise short-time measurements: The column-wheel concept assures dependable control of all chronograph functions, the jumping minute counter always delivers distinct legibility of stopped times and the flyback system makes it possible to accurately measure the durations of events in quick succession.

 

a.lange&Söhne-datographe perpétuel

Datograph Perpetual. © A. Lange & Söhne

With its Lange outsize date, day of week, month and leap year indications, the perpetual calendar requires no adjustment until the year 2100, when a one-day correction is needed. All calendar displays can be advanced simultaneously using the rapid-correction pusher. Additionally, three recessed correctors allow the displays to be adjusted separately.

 

a.lange&Söhne-datographe perpétuel

Manually wound L952.1 movement. © A. Lange & Söhne

The dark grey hue of the dial clearly emphasises the displays and prominently showcases the deep blue lunar disc with its golden stars. Baton hour markers as well as hour and minute hands in rhodiumed gold highlight the rich-contrast design that was first introduced with the 2010 launch of the pink-gold version. The chronograph hand indicates the stopped time to one-fifth of a second. It is made of blued steel. The same material was chosen for the minute counter and seconds hands, allowing them to stand out prominently against the bright rhodié background of the subsidiary dials. The manually wound L952.1 movement consists of 556 lavishly finished parts,and offers 36 hours of power reserve.

 

a.lange&Söhne-datographe perpétuel

Back of the timepiece. © A. Lange & Söhne