4/JUN/1930 Comodoro Rivadavia - Buenos Aires, airmail cover flown by Aeroposta Argentina S.A. franked with 35c., arrival backstamp of 6/JUN, very nice! (Image)

21/JUN/1930 Comodoro Rivadavia - Buenos Aires, airmail cover flown by Aeroposta Argentina S.A. franked with 35c., arrival backstamp of 21/JUN, very fine quality! (Image)

28/JUN/1934 General Alvear - Uruguay, registered airmail cover sent by Zeppelin franked with 74c., on back transit mark of Buenos Aires and Montevideo arrival 30/JUN, very fine quality and very rare (covers sent from the interior of the country to Montevideo in this flight are very scarce, possibly less than 10!) (Image)