JU 88P.

 The Ju 88P was an anti-tank version of the Ju 88, designed to carry a large anti-tank cannon. It was developed in 1942, after the invasion of Russia did not achieve a knockout victory in 1941. The prototype was tested in mid 1942, and carried a single 75mm KwK 39 (Kampfwagen-kanone), in a large gondola under the fuselage. The KwK 39 tended to damage the aircraft when fired, and was replaced with a slightly less destructive PAK 40 cannon.