Cover sent from Tte. Matienzo Antarctic base to La Plata on 20/OC/1972, on back arrival mark and attractive handstamps (Image)

Cover sent from Islas Orcadas to Córdoba on 2/FE/1942, date of FIRST MAIL sent to the islands (Image)

Cover sent from Islas Orcadas to Bahía Blanca on 5/FE/1945 (Image)

Cover sent from Islas Orcadas to Bahía Blanca on 5/FE/1945 (Image)

4c. Postal card with cancel of "LOS MANANTIALES" (San Luis) of 6/JA/1879, light staining, very rare marking! (Image)

½c. Wrapper with the mark 'DEVUELTO - OFA de IMPRESOS', very fine! (Image)

½c. Wrapper uprated with 1½c., cancelled in PEHUAJO ( Buenos Aires ) and sent to Germany on 3/JUN/1893, VF! (Image)

5c. Stationery envelope uprated with 7c. (GJ.138 + GJ.140 pair), sent from Buenos Aires to Germany on 12/JUN/1894, with arrival backstamp and circular "8", VF! (Image)

5 Old postcards used in 1900s, franked mostly with stamps of the Seated Liberty issue, very nice (Image)

Card franked with 5c. (GJ.222), posted in Buenos Aires on 30/DE/1902, with arrival cancel of "EST. HERRERA" (Entre Ríos), rare! (Image)

Lot of 10 flown covers used in 1930s/40s, one censored (Image)

Cover of DE/1940 with special handstamp for 1st Trip of Steamer DELTARGENTINO, on back it bears several marks of US cities, very nice (Image)

Cover sent from B.Aires to Salta on 24/AP/1952, franked by GJ.1002 alone (Image)

Lot of 28 covers of 1940s to 1950s, mixed quality, some with interesting postmarks, for example of "ISLA VERDE" (Cba), and slogan cancels (Image)

Card commemorating 50th anniversary of the Post of Santa Fe, with special cancel for 11/FE/1961 (Image)

Lot of 7 covers posted in 1970s and 1980s, some with very large postage (Image)

Lot of approximately 20 covers, all franked with stamps of the different "Flowers" issues, there are many with high values (Image)

Registered cover sent from Tilcara (Jujuy) to Buenos Aires on 15/JUL/1986, franked with A1.70 (GJ.2213 x20), very good postage (Image)