Stainless steel case: The stainless steel case is robust and gives the watch a noble, silver-coloured shine High-quality stainless steel strap: The high-quality stainless steel bracelet with its flat folding clasp with safety pusher ensures maximum wearing comfort on the wrist Scratch-resistant sapphire crystal: The valuable, artificially produced sapphire crystal has an enormous hardness that is only surpassed by the diamond, sapphire crystal is therefore less sensitive to impact than mineral glass and extremely scratch-resistant Waterproof wristwatch: The watch is waterproof up to 10 bar, that is at a depth of up to 100 m, it can therefore easily withstand accidental splashes of water when washing hands, rain or sweat 40.0 mm x 8.0 mm Environment friendly luminous coating: Seiko's specially developed, environment friendly luminescent coating, lumibrite improves the readability of the dial in the dark without pressing a button