2 Answers

To put it simply, all "Lumen" indicates at A. Lange & Sohne is the use of a semi-transparent dial developed by Lange that link allows the luminous jumping numeral displays link to be fully visible at all hours. It's cool. It's fun. Most importantly, it's an outside-the-box approach for one of the industry's link biggest players. It's hard to imagine many other high-end brands doing something like this.

Wracking my brain I can't think of many other reissued watches that have taken link cues from a battery-powered watch but made it with a new mechanical movement while the other way around seems much more likely these days. The stainless steel case is upsized link from the original 38mm to now a more modern 41mm and 13.85mm thick. But there are subtle little cues that show that Accutron was paying attention to the details when they link remade the classic.