Stores reference 6F/162 (tubes). Used for communication between pilot and co-pilot - usually within biplane cockpits. The fabric covered flexible metal tubes are in excellent condition. The earpieces are manufactured in white metal and marked 'D.H. Type Earphones'. Theae are often seen in use with 'Lewis' pattern flying helmets. In very good condition although tarnished and in need of a quick clean. Stock code NIV.