An Airforce bombsight 'D' instrument in box, together with military issue Mk III compass, 1940s, a WWII air ministry Royal Air Force bombsight 'D' in original protective wooden box, marked 6E/276 No.54406K, Bombsight "D" and crown with A.M to brass bezel, 10 cm diameter, bombsight, 9 cm high, 13 x 13 cm, box