GJ.35, 1c. purple (Image)

GJ.36A, the TRUE redish chestnut, along normal color for comparison (Image)

GJ.38, very fresh (Image)

GJ.38, on fragment, with "circle of 10 wedges" cancel of B.Aires, along datestamp with "+" of 18/NO/1872, VF (Image)

GJ.38, on fragment, with star cancel of Córdoba, along datestamp with Maltese cross for 16/MAR/1871, VF (Image)

GJ.38, on fragment with cancel of VILLA MARÍA (Córdoba) in greenish gray, defect, fine appearance, rare! (Image)

GJ.38, with numeral "15" cancel in single circle, VF (Image)

3 Stamps with forged overprints, perfect to study (Image)

GJ.48, 5c. Rivadavia, rouletted (Image)

GJ.50/52, the 3 high values of the set, rouletted (Image)

GJ.54B, 8c. carmine, type II (Image)

GJ.59, with VARIETY: Overprint extremely shifted (Image)

GJ.67, ½c on 15c., black overprint (Image)

GJ.69 + 69a, 1c on 15c., vermilion overprint, normal + with VARIETY: No line below "1884" (Image)

GJ.69, 1c on 15c., vermilion ovpt., with VARIETY: on bluish paper (dirty plate), VF (Image)

GJ.70, 1c on 15c., carmine overprint (Image)

GJ.71a, with VARIETY "½" at top (Image)

GJ.73, ½c on 15c., black overprint (Image)

GJ.78, marginal block of 4, VF quality (Image)

GJ.87, with cancel of CHILCAS (Santa Fe) (Image)

GJ.91, 30c. Dorrego (Image)

GJ.98A, worn plate, VF (Image)

GJ.99, with Globes watermark, tiny cut below, good opportunity (Image)

GJ.105P, IMPERFORATE pair, the left stamp with VARIETY: Rivadavia with 3rd eye on the forehead, very nice (Image)

GJ.108, block of 4 of VF quality (Image)