In this video, Anthony de Haas, Director of Product Development, at German-based watchmaker A. Lange & Sohne, demonstrates the complicated Datograph Perpetual Tourbillon that was launched at the Geneva watch show (SIHH) in January.

At 10 minutes, this video is not short, but considering every technical feature of this incredible flagship Datrograph is precisely explained by the person in charge of its development – it is well worth the watch.