Caliber Number : 6R35 / Movement Type : Automatic with manual winding capacity / Accuracy : +25 to -15 seconds per day / Case Material : Stainless steel (super hard coating) / Crystal : Curved sapphire / Crystal Coating : Anti-reflective coating on inner surface / LumiBrite : Lumibrite on hands, indexs and bezel / Clasp : Three-fold clasp with secure lock , push button release with extender / Water Resistance : 200m / 660ft diver's / Diameter: 40.5 mm. Thickness: 13.2 mm. Length: 47.6 mm. / Other Specifications :Screw case back. Screw-down crown. Three-fold clasp with secure lock. Unidirectional rotating bezel. / Other Features : 24 jewels. Date display. Stop second hand function.