This Omega is 41 mm 18K Sedna gold case, transparent back, fluted bezel, domed scratch-resistant sapphire crystal with anti-reflective treatment on both sides, sun-brushed blue dial with Pie Pan design, caliber 8923 self-winding Co-Axial master chronometer movement with date and annual calendar functions, approximately 55 hours of power reserve, blue leather strap. Water resistant to 100 m (330 ft).