Caliber Number 8L55 Movement Type Automatic with manual winding capacity Accuracy +15 to -10 seconds per day Duration Approx. 55 hours Case Material Ever-Brilliant Steel Crystal Dual-curved sapphire Crystal Coating Anti-reflective coating on inner surface LumiBrite Lumibrite on hands, indexs and bezel Band Material Silicone Water Resistance 300m / 1000ft for saturation diving Case Size Thickness: 15.7 ㎜ Diameter: 44.8 ㎜ Length: 51.4 ㎜ Other Specifications One-piece structure Screw-down crown Serial number engraved on the case back Unidirectional rotating bezel Other Features 37 jewels Date display Stop second hand function