Mini-cover franked with 5c. (GJ.922), sent from Islas Orcadas to B.Aires on 5/FE/1945, light staining (Image)

Cover franked with 5c. (GJ.921), sent from Islas Orcadas to Bahía Blanca on 5/FE/1945 (Image)

Cover franked with 5c. (GJ.926), sent from Islas Orcadas to B.Aires on 5/FE/1946 (Image)

2c. Postal card used in B.Aires in SE/1886, on front it bears a small "BUZONISTAS" rectangular datestamp and a circular "CARTEROS", on back circular mailbox "28" mark, small defects (Image)

2c. Postal card uprated with 2c. (GJ.102), sent from B.Aires to Hamburg in SE/1890, arrival cancel (Image)

Cover franked with 8c. (GJ.109 with sheet margin and printer imprint), sent from B.Aires to Belgium in DE/1891, with hexagonal mark "LIGNE J - PAQ. FR. N°2" in blue (Image)

2c. Postal card uprated with 2c. (GJ.139), used in B.Aires on 4/JA/1893, with several marks (Image)

Cover sent from B.Aires to Mendoza on 8/JUN/1908, franked with 5c. (GJ.292), with mark on back "TREN ATRASADO - MENDOZA" and nice impression on the flap (globe, lions) (Image)

4c. Postal card with cancel of PUERTO CAZADOR (Misiones), sent to Posadas on 9/MAY/1929 (Image)

Airmail cover sent from Rosario to Brazil on 3/DE/1931, franked with 60c. (GJ.605 + 637 + 641), small defects (Image)

Cover sent from B.Aires to Germany on 28/AU/1934 by steamer "Conte Grande", franked with 35c ( GJ.644 ) (Image)

5c. Stationery envelope with cancel of LAGUNA BLANCA (Neuquén), sent to B.Aires in 1941, VF (Image)

Cover sent from B.Aires to France on 21/JUN/1938, with meter postage of $0.15 (Image)

Cover with postmark of ESTACIÓN MATILDE (Santa Fe), sent to B.Aires on 9/FE/1940, staple holes (Image)

Cover front with postmark of COLONIA MARGARITA (Santa Fe), sent to B.Aires on 22/DE/1940 (Image)

Double postal card of 15c. Eva Perón (communication + reply) with pre-impression of philatelic exposition held in Rosario (Image)

Registered cover sent from Córdoba to B.Aires on 23/AU/1954, franked with $1.50 (25c Eva Perón in pair + $1 Map with Antarctica) (Image)

FIRST FLIGHT: Cover sent from B.Aires to Mendoza on first flight B.Aires - Bahia Blanca - Mendoza by LADE on 27/SE/1954 (Image)

Cover sent on LADE first flight B.Aires - Resistencia - Córdoba, of 22/DE/1954 (Image)

Cover sent from Olavarría to Villa C.von Bernard on 30/DE/1969, with nice slogan cancel "OLAVARRÍA YA ES FUTURO" illustrated with cement factory (Image)