For those of you who might not recall this specific version of the Datograph, I encourage you to check out Arthur’s hands-on with the original model. As a quick refresher, that lovely dial offers a lot of information, including time, a perpetual calendar, a flyback chronograph, grand date, power reserve, and moon phase. Oh, and there is a tourbillon, but you can only see it from the back. There aren’t that many ways left to flex on a tourbillon but making it only visible via a display case back is definitely a drip most German. In what is already one of the most beautiful movement designs in modern watchmaking, this tourbillon looks lovely and the stealth implementation protects both the dial design and Lange’s typically stoic approach to outright ornamentation.