Model : PVD Black Coated Polished Stainless Steel Casework, Black Tachymeter, White Dial, White Subdials , Lumed steel Sticks Hour Index, on Leather Strap with Insignia Buckle Movement: Japanese OS 20 Working Chronograph Quartz Movement Functions: Hours, Minutes, Secs at 6.00 Subdial, Date ( Set via crown), Chronograph, 24 Hour Indicator at 3.00 Subdial Dimensions : Width 42.5mm x 14mmThk Material : 1 piece Forged Solid 316 Stainless Steel, Thick PVD Black CoatingBack : Solid case back with Snoppy Graphic Insignia Crown : One-piece Screw down crown Crystal: Sapphire Crystal Water-resistant