2 - 4 RM South America flight, always 2 values on Zeppelin cover of the South America flight 1930 from "FRIEDRICHSHAFEN 18.5.30" to Libau / Latvia, letter the circuit with arrival postmark Friedrichshafen from 6. June, in perfect condition, cover at the right margin scuffed and horizontal fold trace, unusual and high-value franking in perfect condition, Michel 1.700.-+(Sieger-no. 57 P)