Swiss Quartz Chronograph Movement High Grade Stainless Steel Case Screwed Down Stainless Steel Back Screwed Down Crown Super Hardened K1 Mineral Crystal Anti-Microbial Polyurethane Strap with Stainless Steel Inserts Uni-Directional Rotating Bezel Water Resistant for 20 ATM (660 feet) Non Radioactive, Long Lasting Luminescent Hands and Indexes Dimensions: Case diameter (w/o crowns and pushers) – 45mm Case Thickness – 15.5mm (9/16”) Weight – 3.2 oz. (91 gm)