GJ.650a, 1928 1P., block of 4 with SHIFTED CENTER variety, MNH (+50%), superb and very rare! (Image)

GJ.845SG, 1940 30c. Stylized airplane PRINTED ON GUM, superb, rare! (Image)

GJ.9Aa, 4 Reales chocolate with "CUATO Ps" error, used, barely cancelled in one corner, excellent and rare, signed by Victor Kneitschel on back (Image)

GJ.11, IN Ps azul, type 44, mint, VERY OILY impression, huge margins, superb, very rare, signed by Victor Kneitschel on back (Image)

GJ.16a, 4R. green with COMPLETE DOUBLE IMPRESSION variety, mint, excellent quality, very rare! (Image)

GJ.16b, 4R. green with PARTIAL DOUBLE IMPRESSION variety (right half of the stamp), with the scarce blue 9x10 dotted cancel of Buenos Aires (+150%), VF quality! (Image)

GJ.17b, 1P. blue with very notable PARTIAL DOUBLE IMPRESSION variety (left half), excellent! (Image)

GJ.17b, 1P. blue with PARTIAL DOUBLE IMPRESSION (very notible in "FRANCO"), excellent! (Image)

GJ.17g, 1P. azure, 2 examples on fragment used in B.Aires, BOTH WITH VARIETY "bottom left angle defective", excellent quality and very rare! (Image)

GJ.17i, 1P. with variety "top right angle defective" (position 12), very peculiar and unusual DARK GREENISH BLUE color (GJ.17A, but the variety is not yet catalogued in this shade), superb quality, very attractive! (Image)

GJ.17j, 1P. AZURE (scarce color), with VARIETY: "White spot at right of the S of CORREOS" (position 24), VF quality! (Image)

GJ.17Aa, 1P. light milky blue, COMPLETE DOUBLE IMPRESSION variety, splendid, very rare. With Alberto Solari certificate (Image)

GJ.18, 2P. red, "WITH BEARD" variety, mint, huge margins, fresh, excellent! (Image)

GJ.16/18, 4R, 1P and 2P., Liechtenstein reprint on paper with star watermark, the 3 values on a sheet in groups of 10, including VARIETIES: for example in the 1P.: "Frame broken above the first R of CORREOS" (GJ.17k), "top right angle defective" (GJ.17i), "frame defective between N and C of FRANCO" (GJ.17e), etc., excellent quality, rare! (Image)

GJ.20a, 2P. greenish blue, clear impression, with VARIETY "top frame line broken", with tiny and insignificant thin on back in the hinge area, large margins, very fresh, superb front, very rare! (Image)

GJ.21c, 1P. rose, with VARIETY "defective frame between the N ad C of FRANCO" (position 31), excellent! (Image)

GJ.21h, 1P. rose with VARIETY "white spot at right of the S of CORREOS" (position 24), excellent quality! (Image)

GJ.21i, 1P. rose, with VARIETY "top frame broken above the first R of CORREOS" (position 4), VF quality! (Image)

GJ.21A, 1P. rose-carmine (rare shade) with VARIETY "1 without period" (not catalogued for this color), with blue 6x6 dotted cancel of Estafeta Central B.Aires (+100%), VF quality! (Image)

GJ.1e, with variety "double period after CENTAV", used with SALTA cancel, very nice, signed by Solari on back (Image)

GJ.2d + 2a, 10c. green, strip with the 9 types, the 8th stamp with VARIETY: "curved line across TA" (position 26), MNH (+50%), excellent! (Image)

GJ.2, 10c. green, with VARIETY: "Broken at top left", very nice! (Image)

GJ.2, 10c. green, with VARIETY: "With glasses over the eyes and dot inside the 0 of 10", along a normal example for comparison, VF! (Image)

GJ.3f, 15c. blue, block of 4, one with VARIETY: "Frame pattern incomplete and bottom line omitted", excellent! (Image)

GJ.3g, 15c. blue with VARIETY: "Outer top right frame line incomplete", excellent quality! (Image)