Omega Aqua Terra 150M Co-Axial Master Chronometer Watch - 41 mm Steel Case - Black Dial - Black Leather Strap - 220.13.41.21.01.001 Ombre 25 mm stainless steel and

25 mm stainless steel and 18K yellow gold case

flared screw-down crown with Rolex emblem

40 mm 18K white gold case

39 mm 18K yellow gold case

Omega Aqua Terra 150M Co-Axial Master Chronometer Watch - 41 mm Steel Case - Black Dial - Black Leather Strap - 220.13.41.21.01.001 Ombre 25 mm stainless steel and41 mm stainless steel case, transparent back, screw in crown, domed scratch resistant sapphire crystal with anti reflective treatment on both sides, black dial with a horizontal teak pattern, caliber 8900 self winding Co Axial master chronometer movement with date function, approximately 60 hours of power reserve, black leather strap. Water resistant to 150 m (500 ft).