United States: Postal History 1933, Century of Progress Graf Zeppelin Flight cover, franked wi...

United States: Postal History
1933, Century of Progress Graf Zeppelin Flight cover,
franked with 50c (C18) block of four, with plate inscription (separated from block), cancelled New York (4 Oct), endorsed "via Graf Zeppelin from Friedrichshafen" in manuscript, dual German and USA flight confirmation cachets, Friedrichshafen (2 Nov) and New York (18 Nov) backstamps, a cover with tremendous eye-appeal. (Mi. 355C)
Cover