1930, South America flight, Argentinian post, cover with 2 pieces 50 C. And vertical pair 1 P. Zeppelin stamps with blue overprint and 2 and 10 C. Postal stamps additional franking from "AEROPOSTAL-B. A. ARGENTINA 21 MAY 30" to Bensheim with arrival postmark Friedrichshafen from 6. June and appropriate Cachet, legitimate condition, decorative document