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The observation watch for the wrist

With superior rate accuracy and eminent legibility, the RICHARD LANGE continues the tradition of scientific observation watches at A. Lange & Söhne. The solid-silver dial features the slender Roman numerals that were typical for scientific observation watches during Richard Lange’s epoch. In 1868, he was appointed director of the manufactory and advanced precision watchmaking with his insights and inventions.

The RICHARD LANGE White Gold with argenté dial has blued steel hands and allows readings of the time to an accuracy of one-sixth of a second.
The dial of the RICHARD LANGE in pink gold is reduced to the basic elements of hours, minutes and seconds. The hands are made from pink gold and blued steel.

The timepiece owes its precision to a balance spring developed and manufactured in-house that beats at a rate of 21,600 semi-oscillations per hour. The sweep-seconds hand is made of blued steel and contrasts well against the dial. When the crown is pulled, it stops instantly. This allows the watch to be set to one-second accuracy. Readily visible through the sapphire-crystal caseback, the sweep-seconds wheel train is integrated between the three-quarter plate and a separate bridge.

RICHARD LANGE – A. Lange & Söhne

The short film shows the RICHARD LANGE and its precision-enhancing features: the slim blued central seconds hand, the clear dial with slim Roman numerals, the mechanism for the indirect centre-seconds drive and the vibrating off-set balance with the Lange balance-spring. Lastly, we see the correct operation of the watch demonstrated.

Discover the models

2 Models of the RICHARD LANGE

Movement L041.2

Number of movement parts


Number of rubies


Number of screwed gold chatons


Power reserve

38 hours when fully wound

Oscillation system

Frequency: 21600 semi-oscillations per hour

Beat-adjustment system: Screw balance

Movement measures

Diameter: 30.6 mm; height: 6 mm

Movement Movement