Cover sent from B.Aires on 9/MAR/1951, franked with 20c., with datestamp of San Martin Antarctic base, VF (Image)

Airmail cover sent to Buenos Aires on 28/JA/1971, with cancel of MARAMBIO Antarctic station, along "Correspondencia Transportada por Helicóptero" handstamp, VF quality (Image)

Cover with postmark of Marambio Antarctic station 20/MAY/1978, VF (Image)

Card with postmark of Orcadas Antarctic station (2/JUN/1978), VF (Image)

Folded cover sent to Tucumán franked with diagonal bisect 10c. Confederation (GJ.2) used as 5c., with wreathed SALTA - FRANCA cancel, along Solari certificate, VF (Image)

Letter sent from Buenos Aires to Paris on 13/MAR/1862 by French mail, via Bordeaux, with consultar datestamp and postage due mark on front, and arrival backstamp, VF (Image)

Folded cover sent from B.Aires to Paris on 29/DE/1862 by English mail, via England, with arrival cancel on back (5/FE/1863) and several postal marks (Image)

Circa 1864: folded cover from Buenos Aire to Corrientes, franked with 2x 5c. Rivadavia 1st or 2nd printing, OM cancel, VF quality (Image)

16/MAR/1865: Mercedes - Goya, entire letter franked by GJ.4 (yellow-green), pen cancelled, VF quality (Image)

Entire letter sent from Buenos Aires to Bordeaux on 24/MAR/1879 "via steamer Valparaíso, via Montevideo", franked with Belgrano 16c. rouletted (GJ.50), VF quality! (Image)

Cover sent to Italy on 15/JUL/1879, franked by GJ.50 with rectangular datestamp of SANTA FE perfectly applied, VF quality! (Image)

Large part of a cover front sent by steamer "Gironde" to Italy from Buenos Aires on 24/DE/1884, franked with 24c. San Martín rouletted (GJ.52), VF quality (Image)

Kidd 2c. lettercard used in Buenos Aires on 4/AU/1888, interesting "Buzón 14" marks, VF quality (Image)

Folded cover used in Córdoba on 9/NO/1888, franked with 5c. Rivadavia large collar (GJ.84), VF quality (Image)

½c. Wrapper to Buenos Aires, the addressee could not be located so it was processed by Oficina de Listas on 29/NO/1888, the piece was eventually returned to sender, with interesting datestamps on back, VF quality (Image)

Front of 4c. lettercard sent to Buenos Aires on 14/OC/1889, with rectangular datestamp of COLONIA FELICIA (Santa Fe), VF quality (Image)

8c. Stationery envelope sent from Córdoba to Buenos Aires on 22/AP/1890, franked 2x 5c. Rivadavia small head (total 18c.), VF quality (Image)

2c. Lettercard used in Buenos Aires on 21/MAY/1890, with 6 different cancels (5 on back), some very interesting: "OC.CS Nº0", etc., VF quality (Image)

GJ.133 + 134, in PAIRS franking wrappers for printed matter used in August in September 1890. These stamps are very scarce used alone in pairs, paying the second rate for newspapers, rare! (Image)

Mourning cover used in Buenos Aires in SE/1890, franked with 2c. Derqui, VF quality (Image)

Provisional 5c. stationery envelope + GJ.106, sent from Buenos Aires to San Carlos Sud on 3/JA/1891, excellent quality! (Image)

21/AP/1891: Buenos Aires, cover franked with 2c. Derqui, cancelled "BUZON 73", VF quality (Image)

25/FE/1892: Tucumán - Buenos Aires, 2c. lettercard uprated with 2x 1c. Vélez Sarsfield (total 4c.), VF quality (Image)

1½c. Lettercard used in Buenos Aires on 20/SE/1892, uprated by ¼c. provisional with black ovpt. + ¼c. provisional with red ovpt. (total 2c.), VF quality (Image)

Wrapper sent from Buenos Aires to Germany (circa 1893) with ½c. Rivadavia corner block of 4 (total postage 2c.), VF quality (Image)