A. Lange & Sohne has released the A. Lange & Sohne Langematik Perpetual in white gold. This watch was unveiled today at the grand opening of the Lange boutique in Moscow. A beautiful black dial, blue moonphase, timepiece that needs a correction once every 100 years. The Langematik Perpetual was Lange’s first self-winding wristwatch with a perpetual calendar and outsize date. Retail price $84,200.