390K views · 649 reactions | First introduced in 2012, the LANGE 1 TOURBILLON PERPETUAL CALENDAR is now available in a limited, commemorative edition in white gold. It features a hand-engraved, white gold moon phase indicator, blue printed displays and blued steel hands. Its tourbillon cock is visible through the caseback – specially decorated with a blue engraving shaped like the Lange outsize date with the number 25. | A. Lange & Söhne | Facebook

60 SECONDS with the A. Lange & Söhne Lange 1 Tourbillon Perpetual Calendar The Lange 1 has seen many variations, and this is perhaps the most impressive. At first glance, instantly recognizable as a Lange 1, this piece also flaunts a perpetual calendar display neatly incorporated to the existing design DNA, and a tourbillon hidden discreetly behind the dial. Sized 42mm in platinum, this example is one of only 100 pieces made in this configuration. It's a brilliantly complicated and beautiful mov