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