IWC Caliber 79320, beats at 28,800 vph, contains 25 jewels & has an approximate power reserve of 44 hours, 44mm stainless steel case, 15mm thickness, blue dial with bold applied index hour markers filled with?luminescent material, scratch resistant sapphire crystal, uni-directional rotating bezel, screw down crown, solid case back, blue rubber strap with quick-change system – spring loaded lever is located on the end of the?strap which easily allows for removing/replacing the strap, tang buckle clasp, automatic movement, water resistant to 120m/400ft.