In the late 1960's, conventional inorganic glass used for watch window (cover glass) was rapidly being replaced with single crystal sapphire - an artificial jewel.
Namiki's technological capabilities are highly valued in the Swiss watch industry, as Namiki has been able to meet the demand of recent design trends for uniquely-shaped sapphire window while still maintaining the high quality that is essential for luxury watch components.
While sapphire glass is generally colorless and transparent, colored cover glass is also in demand for limited luxury watches. Using the EFG method, Namiki succeeded in mass growing uniformly-colored, large sized, single crystal pink sapphire. The pale pink sapphire watch window can bring about an unparalleled, elegant design with the hardness harder than the normal sapphire (Hv=2200)