1919, overprint "Posta Ceskoslovenska 1919" on Austrian 10k violet, basic stamp is type I, full OG, LH, F/VF, expertized by Mrnak and Tribuna, Sismondo certificate, C.v. $300
June 9-12, 1934, Zeppelin 2nd South America Flight registered cover to Brazil, franked by four air post stamps, Berlin connection, red flight cachet, Pernambuco "12.VI.34" arrival ds, VF
