For the last 10 years, the LANGE 31 is the first and only mechanical watch with a power reserve of up to 31 days. It has a built-in, patented constant-force escapement that consistently delivers even torque. This ingenious device is located between the main barrel and the tachograph, precise and precise. At SIHH 2017, Lange pioneered the new LANGE 31 in white 18K gold and gray dial design with a limited edition of 100 pieces. LANGE 31 with gray dial 18K gold white version LANGE 31 Equipped with a white 18K gold case with a diameter of 45.9 mm and a delicate gray dial, the power of the hand-wound movement can hardly be perceived at first glance. Only a large power reserve indicator white number "31" at the top and the large text below the Lange calendar shows a small clue, revealing the movement is fully wound, the watch can run for an entire month. Injecting a 744-hour power reserve for a mechanical watch is already a major technical challenge in itself, and it is even harder to ensure that the operation remains accurate throughout. When the watch is fully wound, the double barrel and its two 185-centimeters long hairspring will provide a great deal of torque in the beginning and then gradually weakened as they approach the end of the power reserve. Therefore, the watch requires independent technical devices to ensure power stability, in order to achieve the most accurate rate, and this device is a constant power escapement system. The system is located between the LANGE 31 double barrel and the TRF and provides constant force to the escapement every ten seconds so that the balance wheel can continue to oscillate at the same and appropriate amplitude. Watch from the first day to the thirty-first day to keep accurate travel time, until the stopper stops the movement. Constant power escapement function is also obvious. Through the sapphire crystal bottom cover, the wearer can always watch the wheel of the triangle wheel connecting the Quadruple Wheel. Cam with a cleverly designed rotating lever control device, every 10 seconds for the constant motion balance spring to add new power. Insert a separate key into the square slot of the sapphire crystal bottom cover to tighten the strong and powerful mainspring. Key technology features include integrated rear ratchet and torque limiter, the former can make the chain more smooth and easy process, the latter can prevent inadvertently tighten the hairspring. This large dynamic watch masterpiece highlights the top watchmaking skills, in full compliance with global connoisseurs Lange expectations. |
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