GJ.3, type 3, franking an undated folded cover sent to Corrientes, with very attractive pen cancel, VF quality! (Image)

GJ.4, yellow-green, beautiful single of very wide margins, on large part of a folded cover, with an attractive pen cancel of origin to be determined, VF! (Image)

GJ.6, yellow and lemon yellow, 6 examples with varied pen cancels, VF quality and very interesting! (Image)

GJ.6, yellow and lemon yellow, 6 examples with varied pen cancels, VF quality and very interesting! (Image)

GJ.11, rose, with circular datestamp of Corrientes, superb, signed by Victor Kneitschel on back! (Image)

GJ.13, dull rose, beautiful example on almost complete cover sent to Concepción, with attractive pen cancel, very nice! (Image)