It's hard to believe that Lange's most daring watch is Zeitwerk, was launched in 2009. Several variations have been added to the collection since then, all with chimerical complications: Striking Time, Minute Repeater, Decimal Strike.

Marking its XNUMXth anniversary, Lange's first mechanical wristwatch with a digital display features a new in-house caliber featuring a surprising new function: the date! Thus was born Zeitwerk Date. With the presentation of the Zeitwerk in 2009, A. Lange & Söhne ushered in a new era in timekeeping and design with the innovative concept of the first constant force escapement watch with jumping digits and digital display.

Today, ten years after its introduction, Lange's mechanical digital watch welcomes a newly developed movement that incorporates an additional function: a ring-shaped date window, with printed numbers from 1 to 31 surrounding the dial where the current date is displayed in red (the date display can be adjusted with the corrector at 8 o'clock) and appears perfectly in harmony with the design of the dial, which surrounds the exclusive Zeitwerk Time Bridge. First and foremost, in terms of overall shape and style, Zeitwerk is still the watch we all know and appreciate. The case has a diameter of 44,2mm with a height of 12,3mm. It is crafted in 18K white gold and fitted with a brown alligator strap.

Adding a date to the watch was actually quite challenging. The large numeral discs and prominent dial with time bridge, both hallmarks of the Zeitwerk, make it impossible to integrate a conventional date window, much less the typical Lange date. That's why the development team needed a whole new design approach. The incorporation of the date also raised another problem: as it would take too long to set the time via the crown, minute by minute the watch includes an additional button at 4 o'clock, used exclusively to advance the timekeeping. .

The integration of the hour button has resulted in significant design changes. To allow the correction to work independently of the motion switching cycles, a clutch decouples the hour ring from the jumping number mechanism each time the button is pressed. The toggle pulse is generated when the button is released.

For this reason, A. Lange & Söhne Zeitwerk Date incorporates a newly developed movement with a clearly improved movement architecture, the caliber L043.8 which shows a huge improvement over previous Zeitwerk watches, especially as regards the power reserve which has been doubled, from 36 hours to 72 hours (3 days).

The new Zeitwerk Date by A. Lange & Söhne is part of the SIHH 2019 novelties. Its price will be 91.200 euros, with deliveries starting in June 2019.