316l surgical-quality stainless steel case; jeweled automatic movement; jewel bearings: 20 jewels; 36-hour power reserve; beats per hour (bph): 21600/hour; sapphire-coated mineral crystal; skeleton dial; observation caseback to view movement; logo-engraved crown; genuine leather crocodile-embossed strap; logo-engraved stainless steel clasp; luminous hands; 44mm diameter; 5 atm water resistance;