To maintain ornamental texture and improve night illumination quality by a simple structure without causing cost increase.

When a power source of a light source 6 for illumination is off, a ring part 4 around a dial 3 improves texture as a metallic ornament. When the power source of the light source 6 is turned on at night or the like, illuminating light from the light source 6 is made incident on an inner side of the ring part 4, it transmits through a ring part 4 interior, it is diffused and emits light outside, a zone layout is highlighted and visibility at night is improved. By this, inexpensive illumination with texture and high quality can be provided by a simple structure.