GJ.63, envelope 12c. typographed, with COLONIA SAN AGUSTÍN (Santa Fe) cancel, VF! (Image)

GJ.76, pair on fragment with rectangular datestamp of PATAGONES, VF! (Image)

GJ.84, 13 stamps with interesting cancels + fragment with 3 examples, 2 with shifted perforation, VF! (Image)

GJ.93, 1888 50c. Mitre, type 3, mint with original gum, defects, front of excellent appearance! (Image)

Registered cover sent to Switzerland with spectacular 50c. postage (GJ.224 strip of 5, 10c. Seated Liberty), VF quality, rare! (Image)

GJ.226, 1899 Liberty 12c. olive green IMPERFORATE variety, with huge margins, used, extremely rare, unlisted! (Image)

GJ.237/238, 1899 10P. and 20P. Seated Liberty, DIE PROOFS printed on cards with glazed front, in unissued colors, VF and rare! (Image)

GJ.238 + other values, 1899 Seated Liberty, lot of 33 TRIAL COLOR PROOFS printed on card, most of the 4 high values, mounted on pages of an old collection, VF general quality, low start! (Image)

GJ.273, block of 8 with rare oval cancel of MENDOZA, VF and rare! (Image)

GJ.273, 5 blocks of 4 with different cancels (B. Mitre, La Plata, Carmen, etc.), all of first day of issue, VF quality! (Image)

EXTREMELY RARE and probably UNIQUE die proof with decree used postally as if it had been a postal stationery: GJ.273, 1902 Port of Rosario, die proof with decree sent from Rosario to Sastre on 26/OC/1902 (first day of issue), with arrival mark of the following day, with some creases probably produced during its postal journey, exceptional piece and in my opinion unique! (Image)

Provisional 5c. stationery envelope + GJ.273 (Port of Rosario) in strip of 5, used in Buenos Aires on 26/OC/1902 (first day of issue), VF quality! (Image)

Registered cover used in Buenos Aires and dispatched at sucursal VILLA URQUIZA, franked with 6 examples of GJ.273 (Port of Rosario) cancelled on 26/OC/1902 (first day of issue), VF quality! (Image)

GJ.273, 1902 Port of Rosario with variety DOUBLE PERFORATION bellow, VF and scarce! (Image)

GJ.273, 1902 Port of Rosario (ships, sailing boats, dock), DIE PROOF in bluish green, printed on unsurfaced paper glued to card, excellent quality! (Image)

GJ.273, 1902 Port of Rosario, 20 different TRIAL COLOR PROOFS, 4 on card of unsurfaced front, other 10 on card of glazed front, and 6 on glazed card, excellent quality, very nice group! (Image)

GJ.425a, block of 4 with DOUBLE IMPRESION, one horizontal, VF quality! (Image)

GJ.428, 1917 5c. San Martín with honeycomb wmk, fantastic block of 4 with numbered sheet corner, one stamp (and part of the other 3) unprinted, being printed on back ON GUM due to a pre-printing paper fold, excellent quality and very rare! (It is the ONLY KNOWN EXAMPLE ON GUM of this stamp!) (Image)

GJ.432b, block of 4 with DOUBLE IMPRESSION, one inverted, MNH (+50%), VF! (Image)

GJ.434CZ, 1917 4c. San Martín, block of 4 WITH LABELS AT LEFT (uncatalogued variety!), MNH, excellent, rare! (Image)

GJ.455, 1917 20P. San Martín, mint with small hinge mark, excellent quality! (Image)

GJ.459b, pair with DOUBLE IMPRESSION, VF quality! (Image)

GJ.459, vertical pair with 2 labels at left with a faint INVERTED DOUBLE IMPRESSION which can be clearly seen on the labels, forming TETE-BECHES, VF and rare! (Image)

GJ.471a, with variety: DOUBLE IMPRESSION, one faint, notable in the sheet margin (Image)

GJ.544CD, 1922 1c. San Martín with large sun wmk, block of 4 with LABELS AT RIGHT, MNH (+50%), excellent! (Image)