The moon phase display has always been one of the most complex functions. Through the open window, it seems that you can see the movement of the stars as time passes, mysterious and fascinating. The Master Ultra Thin Moon is like a treasure of the Master Series, paying tribute to the moon phase display complication that the Jaeger-LeCoultre Grande Maison has been fascinated with for decades. This rose gold men's watch adds new features to the moon phase function. The moon and stars shine against the deep midnight blue background. The rose gold is delicately polished. On the wrist, it is exquisite and gorgeous.