de-Havilland-DH.98-Mosquito-prototype-W4050-25-November-1940 2 Published on November 24, 2017 in 25 November 1940Full resolution (908 × 525) ← Previous Next → The prototype DH.98 Mosquito, marked W4050, takes off on its first flight at Hatfield, 25 November 1940. The airplane is painted yellow overall. (Royal Air Force)