The annual calendar is an interesting complication for A. Lange & Söhne. It is both greatly respected by Lange aficionados and yet it hasn’t seemed a huge priority for the manufacture itself over the last few years. Well, say hello to the new 1815 Annual Calendar from A. Lange & Söhne. This one’s a beauty, and it takes the manufacture’s annual calendar into very new territory, with some new tech and a new look. It’s the Lange you didn’t know you wanted. Let’s dig right in.