Movement 6L35 Drive system Mechanical automatic winding (with manual winding) Accuracy Daily error +15 seconds to -10 seconds Maximum winding time about 45 hours Number of jewels 26 jewels Second hand stop function With calendar (date) function Case, strap material Rust-proof Case size Thickness: 9.9 mm Width: 39.4 mm Length: 43.6 mm Glass material Sapphire Glass coating Internal anti-reflective coating One-button double opening method Arm circumference (longest) 200.0 mm Daily life enhanced waterproof (50m) Anti-magnetic Yes Weight 126.0 g Screw back