The upgraded version of the starry sky moon phase, the Jaeger-LeCoultre Master Ultra Thin Moon, features a 39mm watch from the Master Ultra Thin Moon series. With its simple line design and pleasing dial, it showcases a vibrant display. The six-date display hands, combined with the starry sky moon phase, create a harmonious and beautiful ballet on the wrist. Through the transparent case back, the movement is clearly visible. With a thickness of only 10mm, this ultra-thin movement demonstrates to the world that extraordinary craftsmanship and complex functions can be perfectly exhibited in a compact space.