Lot 91017 – 1930 Zeppelin Pan-American Flight. 14 May cover with Zeppelin sets of three and six (defective)

1930 Zeppelin Pan-American Flight. 14 May cover to New York bearing the Zeppelin sets of three and six (“Z” and “Correo Aéreo” surcharges), the latter with the ordinary inks (the 10c 15c and 25c with faults), all tied by La Paz airmail cds’s, with Zeppelin cachet in English and Spanish on front, “Lloyd Aereo Boliviano” marking and Friedrichshafen duplex on reverse.