1936 Hindenburg flight cover from Pachuca to Germany, attractively franked, with Registry and Hindenburg cachets, New York transits and two "Correspondencias Registradas" labels on back, "Mit Luftschiff Hindenburg Befordert" datestamp applied on arrival, v.f. (Si.409T, Euro 1,350) (Image)

Est.US$250

1936 Hindenburg, second return flight cover from Mexico City, via New York to Germany, with registry label, transit and arrival pmks on back, v.f. (Si.411D) (Image)

Est.US$150