DS Automobiles | Savoir-faire | Guillochage

This watchmaker is observing a timepiece with a guilloché dial. Guilloché: also called engine-turned, refers to an ornament made of straight and curved lines bringing shadows and light to the dial, for better clarity and greater refinement. This technique was once done by hand with a chisel, on surfaces such as wood, ivory and steel. The engine-turning lathe made its appearance later in the XVIIIth century.