Xuetie Na 1959 ushered in the concept of double insurance DS, which became a milestone in its development history. Shockproof movement suspension system, reinforced case, sapphire watch glass, special O-ring on the handle, special crown and case back cover greatly improved the waterproof and seismic level of the self-winding watch at that time, and consolidated the excellent quality of Chevrolet brand in waterproof, seismic and durability. Brand name: Certina. Origin: Switzerland. Positioning: higher than Tissot and lower than Hamilton, belonging to the Chevrolet brand of SwatchGroup, founded in Glen, Switzerland, 1888.