A. Lange & Söhne Richard Lange Tourbillon Pour le Mérite "Fusee-and-chain transmission" Platinum Grande Complication with a Unique Pivoting Dial Segment, Mechanical Caliber L072.1 Manual Wind Movement, Skeleton Back, Hand-Stitched Black Crocodile Strap with Platinum Fold-Over Deployant Buckle, 41.9mm - Precision above all - Boutique Limited Edition of Only 100 Pieces The A. Lange & Söhne Richard Lange Tourbillon “Pour le Mérite” stands as one of the most extraordinary expressions of precision watchmaking in the modern era. Crafted in solid platinum, this 41.9 mm grande complication embodies the founding spirit of Richard Lange, with an emphasis on chronometric performance above all. The dial follows the historic regulator layout, with hours, minutes, and seconds separated for maximum legibility — and with a twist only Lange could conceive. At 6 o’clock, the watch reveals its breathtaking one-minute tourbillon, directly driving the seconds hand. A brilliantly engineered pivoting dial segment at the upper left rotates into position at 6 o’clock to complete the hour track, then disappears beneath the dial at 12 o’clock so the tourbillon remains unobstructed. This dynamic mechanism is unique to the Richard Lange Pour le Mérite and remains one of Lange’s most ingenious dial innovations. The aesthetic is matched by uncompromising mechanics. This timepiece is powered by the Lange Calibre L072.1, a manual-wind movement containing 351 individual components, including a 636-part fusee-and-chain transmission — the most prestigious and historically significant constant-force device in watchmaking. True to the “Pour le Mérite” lineage, the movement incorporates the traditional fusee-and-chain system to stabilize torque as the mainspring unwinds, ensuring uniform power delivery and superior rate accuracy throughout the entire 36-hour power reserve. A sophisticated planetary gearing system within the fusee allows the watch to keep running even while being wound — an engineering feat possessed by only a handful of watches in the world. Visible through the sapphire exhibition case back, the L072.1 is a masterclass in German haute horlogerie. The tourbillon cage is mounted between two diamond endstones, completing a full rotation every 60 seconds to counteract gravitational errors. Every bridge is beautifully adorned with Glashütte ribbing, mirrored bevels, gold chatons with blued screws, and meticulous hand-engraving — details requiring several months of manual finishing. Lange’s patented stop-seconds mechanism for the tourbillon allows the balance to halt instantly when the crown is pulled, enabling to-the-second time setting, a rarity among tourbillon watches. The watch is fitted with a hand-stitched black crocodile strap secured by a platinum fold-over deployant clasp, completing the refined yet powerful presence of the piece. This A. Lange & Söhne Richard Lange Tourbillon “Pour le Mérite” is powered by the mechanical manual-winding in-house caliber L072.1. It’s constructed with untreated German silver bridges and plates decorated with Glashütte ribbing, hand-engraved balance cock, polished chamfers, and gold chatons secured with blued screws. The movement contains 51 jewels, 351 components, and incorporates a 636-part fusee-and-chain transmission that delivers constant torque to the escapement throughout the entire 36-hour power reserve. It includes a patented stop-seconds mechanism for the tourbillon, a shock-resistant monometallic balance with precise poising, and a tourbillon cage mounted between two diamond endstones that rotates once every 60 seconds to counteract gravitational error. The mechanism oscillates at a traditional frequency of 21,600 vph (3 Hz), and all components are meticulously finished and assembled twice in accordance with Lange’s highest standards. Produced in an ultra-limited series of only 100 watches, the Richard Lange Tourbillon “Pour le Mérite” is one of the most coveted modern Langes, representing the pinnacle of precision engineering, aesthetic clarity, and artisanal finishing. It remains not only a masterpiece of mechanical ingenuity, but a landmark creation within A. Lange & Söhne’s most prestigious lineage.