ENDOWED WITH SAXON INGENUITY.

The manually wound movement of the GRAND LANGE 1 has a stop-seconds feature, activated when the crown is pulled, a patented twin-disc mechanism for the display of the outsize date, and a mechanism that indicates the power reserve. A screw balance with a Lange balance spring is responsible for the accuracy of the GRAND LANGE 1. It is shock-proofed, executes 21,600 semi-oscillations per hour, and is adjusted in five positions. Thanks to the whiplash spring, the patented precision beat adjustment system makes it possible to accurately set the balance relative to the pallet fork without having to remove the balance wheel.