cover Spain, Zeppelin flight covers, 1930, four similar Spain-South America covers with multiple Spanish frankings (one has 24 stamps) representing different legs of the flight (Sieger 58A two, 58B and 58C), Seville c.d.s., each has printed Zeppelin airship cachet in yellow (cachet partially covered by stamps on one) and red flight cachets, fine-very fine lot, Sieger DM815