RADIOWAVE WRISTWATCH CASE

摘要

A casing of a radio-controlled wristwatch comprises a casing base body through which a radio wave can transmit, and a thin film covering all or part of an exterior surface of the casing base body and having a surface assuming a metallic color. The casing base body comprises a casing main body portion and a back lid portion, all or a substantial part of the casing main body portion and/or all or a substantial part of the back lid portion being made of a material having a radio wave transmissive property. The material having a radio wave transmissive property consists of a ceramic or glass. The thin film having a surface assuming a metallic color consists of a metal or metallic compound. Thus, it is possible to accommodate not only a watch unit but also an antenna unit in the casing to thereby provide a radio-controlled wristwatch with a built-in antenna that has a luxurious appearance and allows for a greater freedom of design.