Vintage Ds Chronograph Automatic watch, this unique watch that reflects more than 130 years of watchmaking experience. This elegant chronograph is a direct descendant of a historic Certina model. It combines distinctly classic features with fine watchmaking precision and truly timeless style. A high-quality automatic caliber with an incredibly innovative silicon balance spring located at the heart of the inner workings of the watch. Domed watch glass, also known as case glass, allows the watch to be visible from any angle. Unlike its historical predecessors, this watch is made of sapphire crystal.