Ebauches SA, Neuchâtel "Ultra-thin Delirium" quartz watch Gold Length: 29.6 mm. Width: 24.6 mm. Thickness: 1.98 mm. Ebauches SA logo on glass. Circa 1979 The engine-turned gold case is less than two millimetres thick and was designed to integrate all the quartz movement parts. The case has a gold braided-wire bracelet. The analogue display dial, also in engine-turned gold, is protected by a glass with a metallic rim. The watch is set by a push-piece on the case back.