Stainless steel case with a stainless steel bracelet. Bi-directional rotating metallic blue ion-plated bezel with slide-rule. Blue dial with luminous hands and index hour markers. Minute markers around the outer rim. Dial Type: Analog. Luminescent hands and markers. Date display at the 3 o’clock position. Chronograph – three sub-dials displaying: 60 second， dual 12 hour / 60 minute and 1/20th of a second. Quartz movement. Scratch resistant Hardlex crystal. Solid case back. Case diameter: 42 mm. Case thickness: 10 mm. Round case shape. Band width: 20 mm. Deployment clasp. Water resistant at 100 meters / 330 feet. Functions: second， chronograph， date， hour. Additional Info: Rotary slide rule for rapid calculations and conversions:multiplication，division，speed，distance，fuel consumption rate;conversions between nautical and. Sport watch style. Seiko Chronograph Men’s Watch SND255.