| 摘要 |
A timepiece cover glass used in a timepiece with a solar battery is provided. The timepiece cover glass covers the solar battery. The timepiece cover glass includes an antireflective layer is formed on at least both sides of the timepiece cover glass. A formula (1) is satisfied. f(x, y, z)≦̸40 (1), where (f(x, y, z) expresses the absolute value of the difference between the maximum value and minimum value among x, y, and z, where z=550.), xnm represents a wavelength exhibiting a minimum reflectance in a reflectance curve based on the antireflective layer, ynm represents a maximum sensitivity wavelength of the solar battery, and znm represents a maximum visible sensitivity wavelength, and the luminous reflectance is 0.6% or less.
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