This Omega is 41 mm stainless steel case, transparent back, self-locking crown, 18K sedna gold unidirectional rotating bezel with ceramic ring, sapphire crystal with anti-reflective treatment inside, black dial 18K sedna gold hands, caliber 8400 self-winding movement, approximately 60 hours of power reserve, brown leather strap. Water resistant to 300 m (1000 ft).