Limited edition of 18 Jaeger-LeCoultre Master Grande Tradition Tourbillon à Quantième Perpétuel tourbillon watches in pink gold, with a 42mm 18K rose gold case, clear and easy-to-read dial, equipped with hours and minutes , Seconds, perpetual calendar, tourbillon and many other functions, can be called the ultimate expression of beauty and function. Through the sapphire crystal case back, you can see the operation of Jaeger-LeCoultre automatic 987 movement. The watch is set with 124 high-quality 1.9 carat diamonds, has a 48-hour power reserve, is equipped with an alligator leather strap, and is water-resistant to 50 meters. The watch is equipped with a silicon escapement to ensure perfect timing. Silicon is an excellent material. With its excellent hardness and extreme wear resistance, it can be used without lubricants. Its superior friction coefficient greatly reduces the friction inside the movement. Its lightweight and unparalleled body performance Good inertia, which improves operational efficiency. In addition, the production technology of silicon allows watchmakers to make very complex parts with precision that cannot be matched by steel. With the flexibility of this component in the definition of geometry, it is possible to carve out a hollow structure with a smaller rotor and moment of inertia, allowing more energy to be transmitted to the balance. Finally, silicon can also be used to make one-piece parts, such as built-in pawl pallets, and the design itself improves accuracy.