Auction # 2501 ARGENTINA: Special January auction

GJ.6, yellow, complete sheet with 4 groups of 8, composition 2 (with types 5 and 6 interchanged), disposition III (sheet of 4 groups of 8, the left groups in normal position, the right ones inverted), with notable differences in the intensity of the impression due to different ink load, rare. Two stamps with tiny defects of little importance, in general of excellent quality!