this Omega is 44.25 mm stainless steel case with anti-magnetic properties, transparent back, 18K Sedna gold crown and push pieces, 18K Sedna gold bezel with brown ceramic ring and Ceragold tachymeter scale, scratch-resistant sapphire crystal with anti-reflective treatment on both sides, brown sun-brushed dial with diamond polished 18K Sedna gold indexes and hands, caliber 9904 self-winding Co-Axial master chronometer movement with chronograph and moonphase indication, approximately 60 hours of power reserve, brown leather strap, polished-brushed foldover buckle. Water resistant to 100 m (330 ft).