The brand made its mark with the launch of the Rado DiaStar in 1962—the world’s first scratch-resistant watch—utilizing tungsten carbide and sapphire crystal Wikipedia Wikipedia . In the mid-1980s, Rado pioneered the use of high‑tech ceramic and materials like Ceramos and plasma ceramic—remarkably hard yet lightweight—solidifying its reputation for cutting-edge material engineering https://saicreationswatches.com/collections/rado