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Devoted to mechanical ingenuity

The ZEITWERK is the first mechanical wristwatch that displays the time digitally with jumping numerals that allow unambiguous legibility at all times. In addition to a tens- and a units-minute disc, the jumping numerals mechanism is endowed with a large hour ring that spans almost the entire diameter of the movement. All numerals are identical in size and arranged for natural left-to-right reading.

One special feature of the ZEITWERK in pink gold is the time bridge, which penetrates the dial as a component of the movement and frames the time displays. Functions of the ZEITWERK in white gold: subsidiary seconds with stop seconds, jumping numerals display for hours and minutes, UP/DOWN power-reserve indicator, 36 hours power reserve.
The ZEITWERK’s manufacture calibre L043.1 has a jumping numerals mechanism consisting of three discs.

When we developed the ZEITWERK, we questioned everything – except for the mechanical heart. The result is a digital-display watch with a jumping numerals mechanism. Its most salient design feature is the time bridge. Framing the displays of hours, minutes and seconds, it is a component of the movement that penetrates the dial in this place.

LANGE ZEITWERK – A. Lange & Söhne

The short film shows detailed views of the Zeitwerk, our mechanical watch with a digital display: the crown positioned near the top of the side of the case, the AUF/AB (UP/DOWN) power-reserve display, the vibrating off-centre balance-wheel, the busy action of the small seconds and finally the complete movement. A close-up view shows the changing all three jumping numerals discs from 7.59 to 8.00. Finally the watch is wound up. On the movement side, this winding can be seen turning the barrel.

Movement L043.1

Number of parts


Number of rubies


Number of chatons


Power reserve

36 hours when fully wound


Frequency: 18000 semi-oscillations per hour

Beat-adjustment system: Screw balance

Movement measures

Diameter: 33.6 mm; height: 9.3 mm

Movement Movement
Movement Movement