2017 SIHH: A. Lange & Sohne LANGE 31 18K White Gold With Classic Gray Dail Watch
In 2017, the Geneva International Senior Watch Fair (SIHH), the first to present a new white Lange 18K gold and gray dial design LANGE 31, and limited edition of 100. Over the past decade, A. Lange & Sohne LANGE 31 is the first and only a power reserve up to 31 days of mechanical watch, built-in patented constant power escapement system, can provide uniform torque. This ingenious device is located between the main barrel and the travel wheel, precise and incomparable. Constant power escapement function is also obvious. Through the sapphire crystal case back, the wearer can watch at any time to connect the four wheel mandrel triangular cam. Cam to the ingenious design of the rotary lever control device, every ten seconds for the constant dynamic gossamel to add new impetus. The independent key into the sapphire crystal bottom cover of the square slot, you can tighten the strong and powerful mainspring. Key features include integrated rear gear ratchet and torque limiter, the former ...