![Bf 109E-4](https://wingstracksguns.com/wp-content/uploads/2017/01/messerschmitt-bf-109E-4-engine-study.jpg)
British pilots study the engine of a Messerschmitt Bf 109E-4. Lieutenant Franz von Werra, shot down September 5th, 1940 over England in aerial combat with a Spitfire. The emblem of the 2nd group of the 3rd Fighter Wing (II.JG3) is visible on the fuselage of the aircraft.