Cover used in 1932, franked with 10c. San Martín w/o period, with triangle "M" perfin of Casa Mayon SA, VF quality! (Image)

Cover used in 1941, franked with 4.15P., all with "ACO" perfin of Frigorífico Armour, very nice! (Image)

Cover used in 1941, franked with strip of 3 of 5c. Moreno with "FNB" perfin of First National Bank of Boston, VF! (Image)

Cover sent to New York in 1941 franked with 1.35P., all the stamps with "HBA" perfin of Harrods Buenos Aires Ltda., VF quality! (Image)

Cover sent to USA in 1941 franked with 1.20P., all the staps with "PAUL" perfion of Intituto Científico Paul Hnos. S.A., VF! (Image)

Cover used in 1942, franked with pair 50c. Petroleum with "BE" perfin of Banco Español, VF! (Image)

Cover used in 1943, franked with 5c. with "IHC" perfin of International Hervester Company of Argentina, VF (Image)

Cover used in 1946, franked with 5c. San Martín with "LB" perfin of Sociedad Metalúrgica La Belga, VF! (Image)

Cover sent to USA in 1947 franked with 1.05P, both stamps with "MBS" perfin of Mitchell´s English Book-Store, VF quality! (Image)

Cover used in 1947, franked with 30c. Stylized Airplane with "NBI" perfin of Nuevo Banco Italiano, VF quality! (Image)

Cover used in 1953, franked with 40c. San Martin, with "CQ" perfin of Compañía Química (Image)

Cover used in 1955, franked with 50c. Sugarcane with "LR" perfin of La Razón, VF! (Image)

Cover used in 1955, franked with 20c. San Martín with "P" perfin of Pond´s Argentina, VF quality! (Image)

Cover franked with 40c. San Martín with diamond "F" perfin of Faustino Fano SRL, VF quality! (Image)

Cover used in 1956, franked with pair 40c. Cotton with "GRAFA" perfin of Grafa S.A., VF! (Image)

Cover franked with pair 2P. San Martin typographed, with "MAA" perfin of Manufactura Algodonera Argentina SA, VF! (Image)

Group of used stamps with interesting PERFINS, most of fine to very fine quality, including some very scarce examples, good opportunity! (Image)

Group of used stamps with interesting PERFINS, most of fine to very fine quality, including some very scarce examples, good opportunity! (Image)

Group of used stamps with interesting PERFINS, most of fine to very fine quality, including some very scarce examples, good opportunity! (Image)