The upgraded version of the starry sky moon phase: Jaeger-LeCoultre Master Ultra Thin Moon, a 39mm watch from the Master Ultra Thin Moon series. With its simple line design and pleasing dial, the display brings vitality to the dial, featuring a six-date display hand paired with a starry sky moon phase, resembling a harmonious and wonderful ballet on the wrist. Through the transparent case back, the movement's operation is clearly visible. This ultra-thin movement, with a thickness of only 10mm, proves to the world that extraordinary craftsmanship and complex functions can be perfectly showcased in a compact space.