Watch external part, manufacturing method for watch external part, and watch

摘要

A watch external part is equipped with a substrate and a coating formed using a gas deposition method. The coating is selectively provided at a portion of a site observable in a state with the watch external part incorporated in a watch. The substrate is made of a material including one type or two or more types selected from a group consisting of sapphire glass, quartz, and plastic. The watch external part is further equipped with a ground layer having at least one layer between the substrate and the coating.