Envelope of "Secretaría del Presidente de la República Argentina", sent from B.Aires to Berlin on 12/DE/1899, franked with 10c., POSTAGE DUE MARK, VF (Image)

Circa 1905, ½c. Liberty Head wrapper + 2c. Seated Liberty (total 2½c.), sent to San José (Costa Rica). The postage was insufficient and it received the "T" marking, very rare destination, very fine quality! (Image)

Buenos Aires: Alvear avenue, ed. Rosauer, sent from Buenos Aires to Montevideo on 11/JA/1906, franked with 2c., and Uruguay postage due stamps, VF (Image)

Circa 1920: Cover sent from B.Aires to Germany with meter postage of 12c., VF (Image)

Registered airmail cover sent from Buenos Aires to Winterthur (Switzerland) on 7/MAR/1936 by Air France, franked with $1.35, arrival backstamp, VF (Image)

Cover sent to Porto Alegre (Brazil) on 6/AP/1937, franked with 5c., datestamp of ITACARUARE (Misiones), censored, VF quality (Image)

Airmail cover sent from San Isidro to Germany on 5/JUN/1937 by Air France, with transit mark of Paris, franked with $1.15, VF (Image)

23/JUL/1943 Buenos Aires - London, airmail cover sent via New York, franked with $1.70, with British censor label, interesting red backstamp partially covered by the label, VF quality (Image)

Cover used in 1959 from Villa Muñoz (Córdoba) to San Francisco (Córdoba), franked with pair of 10c. Rivadavia and pair of 40c. San Martín (total $1), combining stamps of Proceres & Riquezas I and II, VF (Image)

29/JA/1962: Request for renewal of a PO box, with 48 postage stamps for $390, with cancel of Calafate (Santa Cruz), VF (Image)