Official entire letter sent without postage (dated 20/JUN/1861) to Mercedes, single circle in black (only 2 examples known in this color), extremely rare, very fine quality! (Image)

Folded cover dated 5/DE/1863 and sent to Buenos Aires, with blue double circle cancel of stagecoach mail "Ns. PENINSULARES - POROSI 152 - TORRES BERGEIRE Y CIA", very nice piece, the handstamp is perfectly applied, very neat. Signed Victor Kneitschel, rare! (Image)

4 Official folded covers sent without postage to Las Flores between 1866 and 1871, with 4 different cancels of Buenos Aires: rimless datestamp, double circle datestamp with "C", datestamp with Maltese cross, and single-circle datestamp with "C", very fine quality! (Image)

Entire letter sent from ESQUINA (Corrientes) to Buenos Aires on 14/JUL/1866 by steamer Ibicuy, without postage, excellent quality! (Image)

Complete folded letter sent to Mendoza on 20/FE/1869, franked by GJ.37 and cancelled by "ADMON DE CORREOS DE SAN LUIS" double circle, superb and rare! (Image)

Foreign offices in Buenos Aires, Compagnie des Messageries Maritimes, paquebot URUGUAY J4: Entire letter sent collect to Marseille, with octagonal datestamp "BUENOS AYRES - PAQ. FR. J Nº4 - 28/FEVR/1870", postage dues mark for 1 Franc (single rate, "10" handstamp) and arrival backstamp of 2/AP, VF quality! (Image)

15/JA/1871 Buenos Aires - Southampton - Bordeaux (France), per steamship La Plata: Folded cover mailed at the British Consular Agency to collect. Endorsed “via Lisbon and Spain”, it received on front the red "OUTRE MER AMB IRUN A BORDX 17/2" double circle, and arrived at Bordeaux the following day, where it paid dues for 1F. 20c. (“12”), VF quality! (Image)

30/SE/1871 Buenos Aires - Asendorf (Germany): Cover dispatched at the French Postal Agency to collect. It received the octagonal handstamp of the paquebot Gironde: "BUENOS AYRES - PAQ. FR. J Nº1", and "F. /48" of the Postal Treaty between France and Prussia of 1866. “F” indicates the credit in favor of France, and “48” is the article of the treaty affecting the shipment, in this case unpaid covers from Brazil, USA, colonies or countries overseas sent to Prussia-Germany. The cover was taxed 10 Silvergroschen: manuscript “10” in blue pencil, single rate. On reverse with transit marking of Paris and Asendorf arrival, excellent quality, rare! (Image)

Official entire letter sent without postage to Pergamino on 17/MAR/1874, with datestamp of SAN PEDRO with Maltese cross + "BUENOS AIRES" datestamp + transit mark, excellent quality! (Image)

Official entire letter sent without postage (dated 1/JUL/1874) to Pergamino, with the extremely rare "SALTO-B.A." mark in double circle without date (reference piece), and transit mark of Buenos Aires 6/JUL, excellent quality! (Image)

Official entire letter sent without postage to Pergamino on 18/AU/1874, with datestamp of SAN NICOLÁS with Maltese cross perfectly applied, excellent quality! (Image)

Official entire letter sent without postage to Curuzú Cuatiá on 19/OC/1879, with datestamp of PASO DE LOS LIBRES with Maltese cross + straightline "SIN CARGO", on back rectangular transit mark of MERCEDES (Corrientes), very fine quality! (Image)

Official entire letter sent without postage to Pergamino on 1/FE/1883, with datestamp of ZÁRATE with "+", on back it bears an octagonal "BUENOS AIRES (2)" transit mark, excellent quality! (Image)

Front of a mourning cover sent to San Juan on 13/FE/1887 franked with 8c. (GJ.54B) and interesting cancel of TRAVELING PO, at left arrival mark of 23/FE, very fine quality! (Image)

Very nice illustratrated commercial envelope of "Steam factory of CANDLES" (gaucho, parrot, cow) sent by registered mail from Buenos Aires to SanJuan on 22/DE/1899 franked with 32c. (GJ.176 + 178 x6), VF quality! (Image)

Cover sent from Buenos Aires to Córdoba on 11/OC/1901, franked by GJ.240 x5 (block of 4 + single, all with perforation 12), VF quality, blocks on non-philatelic postally used covers are rare! (Image)

Very rare postcard with view of steamship INDEPENDENCIA - Lloyd - Bahia Blanca, franked by GJ.223 (Liberty 6c.) ALONE, sent from Buenos Aires to Bahía Blanca on 10/MAY/1906, little defects, rare! (Image)

Registered cover sent from PUERTO PARANA to Buenos Aires on 25/JA/1912, with colorful combined postage of 17c. consisting of 5 stamps of 4 different issues, excellent quality! (Image)

Cloth envelope sent as PARCEL POST of 210 grams from Buenos Aires to San Juan on 5/SE/1915, franked with 50c. Plowman ALONE, excellent and very rare! (Image)

Registered cover franked with 5c. + 24c. of the issue Centenary of Independence (GJ.403 + 416), sent from Buenos Aires to San Juan on 15/DE/1916. It includes the original content: winning LOTTERY TICKET for the Christmas lottery that was never cashed, excellent quality, extremely rare! (Image)

Cover with declared value of $313, sent from San Juan to Rodeo on 25/OC/1921, with very nice postage of 3.38P., VF quality, fantastic and rare! (Image)

Registered cover with AR sent from Buenos Aires to Germany on 31/JUL/1922 with very nice postage of 48c. (pair of San Martín 24c.), VF quality! (Image)

RARE DESTINATION: Cover franked with 5c. San Martín with period, sent from Buenos Aires to a conscript on the FRIGATE PRESIDENTE SARMIENTO on 10/JUL/1924, it shows the intervencion of the "Office of decipherers" (manuscript note in lilac) and on back "AGENCIA 23 - B.A." along oval mark of the Ministry of the Navy, VF quality! (Image)

23/OC/1929: Postcard sent from Buenos Aires to New York by registered air mail, with nice franking of $1.09, very pretty! (Image)

RARE FREE FRANK: Postcard dated 1/JA/1931 used in Formosa without postage, with the violet oval mark "CARCEL DE FORMOSA - CELADORES". With some defects, but extremely rare, probably unique! (Image)