Swiss made movement Ronda 712.3 lubricated with oil bath Hours, minutes, seconds, screw-down crown stainless steel AISI 316L. with subsequent PVD treatment, completely filled with a special oil that emphasizes the dial, creating the illusion of the absence of glass, and an optical effect of a more intense black and higher legibility. Visible air bubble on the dial to compensate the temperature variations Distinguishing crown on left side Case Diameter: 44,8 mm High quality curved sapphire crystal WATER RESISTANCE: 50 M, 5 ATM Ultra-resistant vulcanised rubber strap in black color Tongue buckle in black steel, Width: 20/18 mm