5 Die essays of designs similar to the adopted ones (3) or different (2), printed in black on yellow cardstock with values 5c, 10c, 54c and 1.80P (2 different), excellent quality, extremely rare group! (Image)

GJ.653, Photographic proof, full size, of an unadopted design proposed for the 1.80P. value of the first airmail issue, illustrator Godofredo Coca, VF and very attractive! (Image)

Circa 1935, die essay of unadopted design: "Airplane flying over the Andes mountains, view of Aconcagua", value 10c., engraved on paper affixed to card, excellent quality, extremely rare! (Image)

GJ.1357b, 1966 Navy aviation school (albatross), block of 4 with variety RED COLOR OMITTED (without the beak), MNH, excellent quality! (Image)

GJ.15, 2P. red, clear impression, very ample margins, very fine quality! (Image)

GJ.16, 4R. green, worn impression, fantastic example of ample margins and with blue dotted cancel of Buenos Aires, superb! (Image)

GJ.17, 1P. VERY dark blue, very worn impression, VF quality, rare! (Image)

GJ.21, 1P. rose, worn impression, wide margins, with blue FRANCA cancel of Rosario (+100%), superb! (Image)

GJ.3, 15c. blue, small figures, used in Rosario, signed by Victor Kneitschel on back, excellent quality, rare! (Image)

GJ.1, 5c. blue, MNH (+200%) with intact and impeccable original gum, absolutely fresh and perfect as the day it was printed over 160 years ago, perfect piece for the most demanding collectors! (Image)

GJ.3, blue, pair with types 1 and 2, on entire letter sent from MERCEDES to Goya on 28/MAY/1861, with typical cancel of origin, excellent quality, rare (NOTE: entire letters of Corrientes that allow to verify the dates of use and origin of the different pen marks are scarce). With Alberto Solari certificate. (Image)

GJ.10, on fragment with complete TUCUMAN-FRANCA fan cancel, spectacular, superb! (Image)

GJ.96, ¼c. José M. Paz, PROOF in greenish blue, block of 4 PERFORATION 11½, printed on paper without gum, very rare! (Image)

GJ.55, 1877 24c. San Martín, pen cancelled block of 9, VF quality! (Image)

GJ.55, 1877 24c. San Martín franking ALONE a registered cover sent from SAN LUIS to Buenos Aires on 29/OC/1887, VF and very rare! (Image)

GJ.59d, 1882 ½c on 5c., small P ovpt., fantastic block of 20 (top part of the sheet) with DIAGONAL overprint, mint with full original gum, excellent! (Image)

GJ.142, 1892 Rivadavia 5c. GREEN, color error, splendid MNH example (+50%), possibly the ONLY ONE IN EXISTENCE in such exceptional quality. With perfect gum, beautiful color, fresh and impeccable as the day it was printed, on back it has a manuscript inscription by Victor Kneitschel: "original" and his signature, great rarity! (Image)

GJ.145P, 1892 16c. Belgrano with small sun watermark, IMPERFORATE PAIR of very fine quality! (Image)

GJ.148P, 1892 1P. San Martín with small sun watermark, IMPERFORATE PAIR of very fine quality. One of the few known pairs with original gum (in the catalog generally valued without gum) (Image)

GJ.162, 1892 2P. San Martín with small sun watermark, PERFORATION 12, used, very rare, VF quality! (Image)

GJ.216, 1896 1.20P. San Martín with COMPOUND PERFORATION, 12 below and 11½ on the other sides, excellent quality, very rare! (Image)

GJ.217, etc, lot of COLOR PROOFS: 13 singles + 15 pairs of values from ½c. a 50c., varied colors, very fine quality, very attractive group! (Image)

GJ.230, 24c. Seated Liberty, fantastic corner block of 4, inverted watermark variety, 3 stamps MNH (+50%), excellent! (Image)

GJ.232, Seated Liberty 30c. dull vermilion, 3 blocks of 4 in very different shades, one with inverted watermark, excellent quality, very nice group! (Image)

GJ.234, 50c. Liberty, 2 blocks of 4 in different shades: dark blue and a rare GREENISH blue also with inverted watermark, the latter is MNH (+50%), very fine quality! (Image)