GJ.650a, 1928 1P. Winged Wheel, with variety DRAMATICALLY SHIFTED CENTER (much more than usual, this example is much more spectacular than those usually seen with shifted center, I had never seen another one like it!), MNH, great rarity! (Image)

GJ.1, with "FRANCA - JUJUY" cancel in ogive, rare, fine quality, signed by Alberto Solari on back (Image)

GJ.38, with the extremely rare pen cancel of CHAÑAR (Córdoba), excellent quality! (Image)

GJ.38, with very rare pen cancel "Nobre 25 1875" (date) applied in MEDINA (Tucumán), excellent quality! (Image)

GJ.57m, 1882 ½c. on 5c., small P, perforated across the middle, block of 4, the bottom pair with positions 47 and 48 ("PROVISORIQ" and "no parenthesis at right"), also with offset impression of the overprints on back, excellent quality and rare! (Image)

GJ.61 + 61a, block of 4 in chestnut, pair in light chestnut, and strip of 3 in unusual dark chestnut, in the latter 2 there is one example with variety "2 without serif", VF quality! (Image)

GJ.79A, 12c. greenish blue, with imperforate sheet margin at left, franking a cover sent from Buenos Aires to Germany on 24/OC/1888, VF! (Image)

GJ.97AP, 1889 ½c. Urquiza IMPERFORATE PAIR, very fine quality! (Image)

GJ.98APH, 1c. Vélez Sársfield type I (with frame below) but printed with worn plate (groundwork of horizontal lines), variety not yet catalogued for this stamp: vertical PAIR IMPERFORATE BETWEEN, mint without gum, rare! (Image)

GJ.102PV, 1889 2c. Derqui, pair IMPERFORATE VERTICALLY, very fine quality (Image)

GJ.119A, 1889 50P. Dean Funes, MNH, as fresh and perfect as the day it was printed, superb! (Image)

GJ.174, 1896 ½c. Rivadavia, block of 9 with "star" bulk mail cancel, very scarce in the low values! (Image)

GJ.176, 1896 2c. San Martín, block of 9 with "star" bulk mail cancel, very scarce in the low values! (Image)

GJ.189O, 1896 5P. San Martín, block of 8 with "star" bulk mail cancel, handsome! (Image)

GJ.199, 1896 30c. Belgrano with large sun wmk and perf 12, mint, VF quality, rare! (Image)

GJ.220PH, 1899 3c. Seated Liberty, vertical pair IMPERFORATE HORIZONTALLY, used, great rarity, undervalued in the catalog. (Image)

GJ.235, 1899 1P. Liberty with variety: OFFSET IMPRESSION of back color on back, extremely rare (I had never seen this variety!!), with minor faults but very interesting for the specialist! (Image)

GREAT RARITY: GJ.302a, 1910 Centenary 2c. with variety COMPLETE DOUBLE IMPRESSION OF THE FRAME, unknown until now, it will be included in the next edition of the GJ catalog. ONLY KNOWN example, excellent quality! (Image)

GJ.340, 1912 3c. Plowman, strip of 10 with "INUTILIZADO" perfs, used for bulk mail, scarce for the low values, VF quality! (Image)

GJ.351/356, 1912 Plowman, cmpl. set of 6 values printed on German paper with horizontal honeycomb wmk, perf 13½x12½, very fine quality! (Image)

GJ374/381, 1912 Plowman, complete set of 8 mint values printed on Italian paper with vertical honeycomb wmk, perf 13½. It includes the very rare 3c. green, excellent quality! (Image)

GJ.428b, 1917 5c. San Martín, block of 4 printed on VERY THICK paper, excellent quality! (Image)

GJ.481, 1918 2c. San Martín with W.Bond watermark, block of 16 WITH COMPLETE WATERMARK, all the stamps with watermark (rare!), most MNH (+50%), excellent quality! (Image)

GJ.539CD, 1922 5c. Postal Congress, on paper with sun with RA watermark, WITH RIGHT LABEL, MNH (+50%), excellent! (Image)

GJ.540, 1922 Postal Congress without watermark and perf 13½, splendid corner block of 4 with LARGE FOLD, excellent quality, spectacular! (Image)