Here is a fun facto for ya, now that you mentioned the Zeitwerk ...
The movement on this is manually wound and the hours and minutes are supposed to be jumping hours and minutes. The same as the A. Lange & Sohne Lange Zeitwerk watch - which was really hard to make and took a really long time to properly engineer.
It seems a bit hard to believe that 4N would get it right so quickly when Lange clearly isn't giving away any secrets.