This Omega is 44.25 mm stainless steel case with anti-magnetic properties, transparent back, screw-in crown, blue liquid metal bezel with tachymeter scale, scratch-resistant sapphire crystal with anti-reflective treatment on both sides, blue dial, caliber 9904 self-winding Co-Axial master chronometer movement with chronograph and moon functions, approximately 60 hours of power reserve, blue leather strap. Water resistant to 100 m (330 ft).