GJ.636/47 + 649/51, first airmail set, 15 values of the set, very low start! (Image)

GJ.641, 24c. in block of 4, VF (Image)

GJ.647, 54c. in block of 4 (Image)

GJ.653 + other values, 7 values of the first airmail issue, most of VF quality! (Image)

GJ.667, 90c. with green ovpt. (Image)

GJ.845/49, complete set in blocks of 4, some with light stain spots, low start (Image)

GJ.845/49, Airplane & Mercury, complete set, MNH (Image)

GJ.846, 4 PROOFS on paper of glazed front, in different colors (1958 Kneitschel, volume II, page 749), VF quality (Image)

GJ.847a, marginal block of 4, one with VARIETY: "1" with period (pos.70), VF (Image)

GJ.848, with VARIETY: spot in front of the cockpit (Image)

GJ.848b, with VARIETY: spot above the cockpit (pos.9) (Image)

GJ.849, PROOF on paper of glazed front, in blue (1958 Kneitschel, volume II, page 749), VF (Image)

GJ.857, 2 blocks of 4 on different papers, very interesting for the specialist (Image)

GJ.860, 30c. printed on CHALKY paper, VF quality! (Image)

GJ.862, 2 blocks of 4 in different shades (different printings), light staining (Image)

GJ.865, with "S.D" perfin (Sharp & Dohme S.R.L.), rare (Image)

GJ.996, marginal block of 4, one with VARIETY: retouch on "EO" of CORREO, VF (Image)

GJ.1114P, imperforate pair, excellent quality, superb! (Image)

GJ.1251 + 1253/56, set (without the $7 with "ARGENTINA" upwards), in blocks of 4 with first day postmark, scarce (Image)

GJ.1337/40, complete set (4 values) in blocks of 4 with first day postmark, scarce (Image)

GJ.1357b, variety: Red color omitted, superb! (Image)

GJ.1427 + 1429 + 1432 + 1434, Stylized airplane, the set in blocks of 4 printed on national unsurfaced paper with round sun wmk, VF! (Image)

GJ.1428, Stylized airplane, corner block of 4, one with VARIETY: Broken wing (it is not GJ.1428a) (Image)

GJ.1428a, corner block of 6, one with VARIETY: broken wing (Image)

GJ.1518, Education, 2 stamps in different shades of light blue, VF! (Image)