1926 (22 Feb) two First Flight covers from Cordoba to Rio Cuarto and from Rio Cuarto to Cordoba, both 5c stationery entire envelopes with appropriate markings, fine-v.f. (Muller 15,15a) (Image)

Est.$200

1930 Zeppelin blue overprint, complete set of five, used with additional franking on special "Primer Vuelo Zeppelin" cacheted cover (legal size) to Germany, appropriate Pan-America round flight cachet and arrival pmks, fine and scarce (Cat No. C20-24) (Image)

Est.$500