GJ.16, block of 4 (perforation reinforced with hinge), small mark of Victor Kneitschel on back, VF (Image)

GJ.19, small defects, very good front (Image)

GJ.46/7, the first 2 values of the set with compound perf (Image)

GJ.98/103, overprint in serif font, cmpl. set (6 values) (Image)

GJ.138/40, complete set, unwatermarked (Image)

GJ.185d, 3 examples, one with "M" without period, all printed on very thin paper, perfect lot for the specialist! (Image)

GJ.247, with "Gral. JOS DE SAN MARTÍN" var. (Image)

GJ.257a, pair, the left example with VARIETY: double impression, VF (Image)

GJ.401c + other values, on fragment, with variety: "M" without period (Image)

GJ.410d, strip of 3, one with VARIETY: "M" without period (Image)

GJ.411d, pair with VARIETY: "J" without period (Image)

GJ.443, pair, one with VARIETY: White line by Chilean sea (Image)

GJ.451/54, cmpl. set, on German paper with vertical honeycomb wmk, perf 13¼ x 12½ (Image)

GJ.500, 20c San Martín w/o period, with overprint in serif font (Image)

GJ.502, $1 with "M.M." overprint, scarce! (Image)

GJ.506, 2c Urquiza, with UNLISTED "M..M" variety (Image)

GJ.508, 5c Moreno, with UNLISTED "M..M" variety in single + block of 4, VF! (Image)

GJ.525, used (Image)

GJ.545d, variety: "P" without period (Image)

GJ.614, complete sheet of 50 stamps, some with small defects, most MNH (Image)

GJ.637, exquisite used pair with VARIETY: end-of-roll joined paper, superb (Image)

GJ.640, on Austrian paper, with VARIETY: Perforated off-center (Image)

GJ.644H, on Dutch paper (NOT yet catalogued), estimated market value US$60, VF (Image)

GJ.681, 2 marginal blocks of 4, both with variety: "S" of SERVICIO defective (Image)

GJ.700/2, the 3 high values of the set, good opportunity (Image)