Auction # 2446 ARGENTINA: Special December auction

GJ.60 + 60o + 60r, 1882 ½c. on 5c. (large P), beautiful block of 50, the 20 bottom stamps with variety "DOUBLE OVERPRINT, one inverted in negative", the 30 top stamps normal except for position 50 with "PROVISOBIO" variety, mint original gum (some MNH), some perforation reinforced with hinges, excellent and very attractive, catalog value US$584+