Austrian cover flown aboard the Graf Zeppelin LZ127 airship's 1933 Suedamerikafahrt / 3rd South America flight, with SAF and Berlin Anschlussflug cachet, Wien / Vienna CDS, and Barcelona receiver from the drop reverse. '17 CV EUR540+++. Only 20(!) Austria pieces were flown on this leg -- with an unknown number with airmail from the WIPA exhibition to Berlin. Slightly worn and wrinkled, good condition as per scans. Rare!