Cover franked with 40c. (GJ.1104) sent from Esperanza station to Esperanza (Santa Fe) on 19/NO/1958 (Image)

Cover with handstamp "Acción del Ejercito en la Antártida Argentina", and cancel of "OPERACIÓN 90 POLO SUR" for 10/DE/1965, light staining (Image)

Coat of Arms issue: 21 cards sent from Antarctic stations Sobral, Brown, Esperanza, Orcadas, Decepción, Belgrano and Orcadas, to Buenos Aires, franked with different stamps of the issue, very nice (Image)

SOB.47, 15c. stationery envelope (catalog value US$20), sent from B.Aires to England in AU/1904 by steamer "MAGDALENA" (Image)

Lot of 23 covers of 1930/40s, many franked with 5c. using different stamps and varied cancels, in general with staining (Image)

Over 70 covers used between 1940s/1990s franked with different basic sets, there is a wide range of rates and different postage combinations (Image)

10/JUL/1941, cover sent from Catamarca to B.Aires and its complete letter, both the envelope and the letter paper with impression of "HOTEL SAN MARTÍN" illustrated with a car promoting the province, very nice (Image)

Lot of approximately 80 covers used between 1940s/2000, mostly franked with commemorative stamps, there is a wide range of postages, rates and interesting cancels (Image)

Lot of 16 covers of HOTEL MONUMENTAL (Mar del Plata), all used, some with minor defects (Image)

Postcard franked with 5c. (GJ.795), with cancel of "COLONIA BOUVIER" (Formosa), small defects (Image)

Cover with postmark of "MENDOZA NORESTE" for 21/FE/1950 (Image)

Cover with postmark of "VIA AÉREA MENDOZA", posted in AP/1950 (Image)

Cover with postmark of "AGENCIA MENDOZA" for 3/MAY/1950 (Image)

Cover with postmark of "LOMAS DE ZAMORA - 117" for 22/AP/1950 (Image)

Cover sent from Buenos Aires to Córdoba (Villa Maria) on 3/FE/1953, containing an advertisement for a philatelic book edited by Bell, interesting (Image)

Lot of approximately 40 covers/cards, all with thematic cancels, for example: Scouts, sport (chess, football), etc., very nice (Image)

Cover commemorating the 25th anniversary of 1st commercial flight to Patagonia, sent from B.Aires to Río Gallegos on 1/NO/1954 (Image)

First flight: Cover sent from B.Aires to Córdoba on 22/DE/1954 on first flight B.Aires - Resistencia - Córdoba by LADE, with arrival backstamp (Image)

Postcard with view of Ezeiza airport, sent from Buenos Aires to Miami on 3/AU/1955, with large handstamp in red for first flight B.Aires - Miami DC-7B, very nice (Image)

Cover used in Chivilcoy on 26/AU/1955, with multicolor postage of 20c., with stamps of the Proceres & Riquezas I issue (Image)

Cover franked with 40c. San Martín, with machine cancel "4 December - Advertising day", VF! (Image)

First flight: Cover sent from B.Aires to Bariloche on 2/MAR/1952 on first flight by Aerolíneas Argentinas, with arrival backstamp (Image)

Registered cover with AR, franked with $600 (GJ.1753 x6 + 1754 x6) and cancelled "ESTAF. 7 CATAMARCA", sent to B.Aires on 13/DE/1977 (Image)

TOPIC FOOTBALL: Cover sent from Buenos Aires to Uruguay on 26/JUN/1978, cancelled on front with special pmk "GOAL 1000 - Rensenbrink (Netherlands )" (Image)

Lot of 45 covers used in 1950s, several with corner cards, all with meter postages (Image)