Omega Seamaster Aqua Terra 150 M Master Co-Axial Watch - 34 mm Steel Case - Yellow Gold Bezel - Mother-Of-Pearl Diamond Dial - White Leather Strap - 231.28.34.20.55.00434 mm stainless steel case, transparent back, screw in crown, 18K yellow gold bezel, domed scratch resistant sapphire crystal with anti reflective treatment on both sides, white mother of pearl dial set with 12 diamond indexes in 18K gold holders, caliber 8520 self winding movement with automatic winding in both directions to reduce winding time, approximately 50 hours of power reserve, white leather strap. Water resistant to 15 bar.