GJ.3, used in AP/1888, rare!! (Image)

GJ.6, perf 12¼, rare! (Image)

GJ.7, used in Buenos Aires, rare! (Image)

GJ.24, very fine (Image)

GJ.24c, with VARIETY: inverted ovpt, signed by Victor Kneitschel (Image)

GJ.73, with WHEATLEY BOND wmk, MNH (Image)

GJ.90, with VARIETY: broken "M" (Image)

GJ.134, printed on Italian paper, horiz honeycomb wmk (Image)

GJ.135, block of 4 printed on Italian paper, horiz honeycomb wmk, perf 13¼ x 12½, very nice! (Image)

GJ.138, unwatermarked paper, VF quality! (Image)

GJ.185d, with VARIETIES: "M" without period + "G" broken (Image)

GJ.187e, with VARIETIES: "M" without period + "G" broken (Image)

GJ.187g, with VARIETY: "G" incomplete and w/o period (Image)

GJ.260, used (Image)

GJ.261/65, complete set with serif-font overprint (Image)

GJ.315, perf 13¼ (Image)

GJ.320a, pair, one with VARIETY: "M" without period (Image)

GJ.375, 2c San Martín, unwatermarked, perf 13¼ x 12½, with UNLISTED "broken M" variety, VF! (Image)

GJ.394CD, round sun wmk, perf 13¼ x 12½, with VARIETY: label at right, NOT CATALOGUED, excellent quality, very rare! (Image)

GJ.411, block of 4, one with VARIETY: "I" with high period, rare! (Image)

GJ.411b, with VARIETY: "I" fallen (Image)

GJ.411d, block of 4, one with VARIETY: "J" without period (Image)

GJ.413a, with VARIETY: "M" fallen (Image)

GJ.413b, with VARIETY: "I" fallen (Image)

GJ.415, block of 4, one with VARIETY: "I" very thick and without period, uncatalogued (Image)