Omega Men's 3570.50.00 Speedmaster Professional Watch with Stainless Steel Bracelet Stainless steel watch with black bezel and dial featuring chronograph functions and luminescent hands and hour markers 42 millimeters stainless steel case with hesalite dial window Mechanical hand-wind movement with analog display Stainless steel band with fold-over-push-button-clasp-with-safety closure Water resistant to 165 feet (50 M): suitable for swimming and showering