AIR MINISTRY SECOND WORLD WAR OFFICIAL COLLECTION. Although no description on site, shows tail & rear fuselage of Armstrong Withworth Wellington twin engine bomber. Once known as a heavy, became a medium bomber, as the larger 4 engine heavies came into service. Shows the amount of heavy damage Barnes Wallace's godedic frame system could sustain & still keep flying. Wallace was also the innovative inventor of the Dam Busters bouncing bomb,& many other innovative & potent weapons.