Luxembourg: 1932, 4. South America flight, handing in for transport Friedrichshafen, R card from DIEKIRCH 28.4. via LUXEMBOURG 28.4. with reverse complete airmail set and colorful D. Reich franking (1 value over margin fixed) with stamp FRIEDRICHSHAFEN 2.5. to Sao paulo with arrival postmark, slight vertical trace of crease, otherwise superb, not frequent combination!