Announced three years ago, the Grand Complication is the most complicated wristwatch ever made by A. Lange & Söhne (we explained it in full right here). Priced with €1.92m (about US$2.14m), the Grand Complication is also the most expensive Lange wristwatch ever. And the first of the six that will be made has just been delivered.

Powered by a movement made up of 876 parts (four times that of a Datograph), the Grand Complication features a grand and petite sonnerie; minute repeater; monopusher, split-seconds chronograph with 1/5 second foudroyante; and perpetual calendar with moon phase.

While the first Grand Complication was being put together, the process was photographed by Lange – here’s a selection of images.

Installing the lightning seconds wheel that makes one revolution a second

Polishing the chiming lever

Filing the gongs of the striking mechanism

Installing the racks of the striking mechanism, which control the chiming of the repeater and sonnerie

The Grand Complication movement as seen from beneath the dial

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