GJ.138, 1915 1c. Plowman, unwatermarked French paper, mint, VF and rare! (Image)

1935 Belgrano ½c. with "M.J.I." overprint, MNH pair, possibly essay, very interesting! (Image)

GJ.444Aa, 1P. Map without borders, block of 8 printed on AUSTRIAN PAPER (not yet catalogued), one with variety "extended border line of the Andes" (position 23), MNH, excellent quality, rare! (Image)

GJ.445a, 5c. Moreno typographed with TRIPLE M.J.I. overprint, block of 4 + 10c. Rivadavia franking a cover sent from Rawson to Puerto Madryn on 24/SE/1938, with arrival backstamp of the same day, very fine quality, extremely rare (only 4 used covers are known with this variety, the stamps are only known used and the catalog value is US$300) (Image)

GJ.761, 43P. Industry with upwards overprint, MNH, excellent quality, very rare! (Image)

Registered airmail cover sent from Comodoro Rivadavia to Buenos Aires on 9/MAR/1942 with MIXED POSTAGE: 25c. official stamp to pay the surface rate + 30c. definitive stamp for the airmail surcharge (official stamps were not accepted), VF quality! (Image)