Seiko 2nd Generation Monster, Stainless Steel Case Black Dial Rubber Strap SRP313J1 (Made in Japan) Imported Seiko 24 Jewels Automatic/Hand Winding Movement with Hackable Second Hand (Calibre 4R36) Stainless Steel Case, Polyurethane Strap Hardlex Mineral Crystal, Day/Date Display, Luminous Hands and Markers Case Size: 42.75mm Diameter, 13mm Thickness Water Resistant - 200M, Screw Down Crown and Case Back