review
A Closer Look: A. Lange & Söhne Lange 1 Tourbillon Perpetual Calendar Lumen
The A. Lange & Söhne Lange 1 Tourbillon Perpetual Calendar “Lumen” is a limited‑edition platinum watch that combines a tourbillon with stop‑seconds, an instantaneous perpetual calendar, a big date, a retrograde day‑of‑week, a peripheral month ring, and a luminous moon‑phase display with integrated day/night