Brand Seiko Model Number SNN177P1 Series Seiko Chronograph Gender Man Movement Japan Quartz Glass Hardlex Crystal Glass Case Diameter 41.5 mm without Crown Case Thickness 12 mm Lug Width 22 mm Case Material Stainless steel Band Material Stainless steel Clasp Fold over clasp with double push button safety Dial Color Silver Calendar Date Luminous Hands Markers Special Features Chronograph Function Water resistant depth 100M