Germany, Airmail, 1930, 4m So. America Flight Friedrichshafen to Rio de Janeiro. Fresh cover franked with 4m Sudamerikafahrt issue, red flight cachet and purple oval Rio de Janeiro receiver on reverse, Very Fine and attractive. Michel No. 439. Sieger No. 57M. Scott No. C39  Estimate $350 - 500. $0 (Image)