Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Vatican City - Zeppelin Flights - 1933 (June 3), 2nd SAF cover to Barcelona, franked by two stamps, tied by Vatican City ''3.5.33'' date stamp, uprated by two Italian adhesives with Rome cancel, Friedrichshafen ''3.6.33'' connection, green flight marking, Barcelona boxed drop of ''3.Jun.33'' on reverse, mostly VF and scarce cover to Barcelona destination, not listed in Sieger, Frost #127-183D, C.v. $1,400, Est. $700-$800, Scott #11, 14