MOON PHASE DISK, WATCH, AND METHOD FOR MANUFACTURING MOON PHASE DISK

原文（中国語）

A moon phase disk is disposed on a back surface side of a dial of a watch and is visually recognizable from a moon phase display window formed in the dial. The moon phase disk includes an upper plate having a disposition hole and formed in a disk shape; a lower plate fixed to a back surface of the upper plate and formed in a disk shape; and a decorative plate disposed inside the disposition hole which is open on a front surface of the upper plate. A first diameter of the disposition hole on a front surface side of the upper plate is smaller than a second diameter of the decorative plate. And a third diameter of the disposition hole on a back surface side of the upper plate is larger than the second diameter of the decorative plate.