This Omega is 44.25 mm 18K Sedna gold case with antimagnetic design, transparent back, 18K Sedna gold bezel with blue ceramic ring and tachymeter scale in Ceragold, domed scratch-resistant sapphire crystal with anti-reflective treatment on both sides, sun brushed blue dial with racing style minute-track, caliber 9901 self-winding Co-Axial master chronometer movement with chronograph and date functions, approximately 60 hours of power reserve, blue leather strap. Water resistant to 50 m (167 ft).