Auction # 1915 WORLDWIDE + ARGENTINA: Special April Auction

GJ.HB 22P, 1966 Independence 150 years, Coats of arms of the provinces and maps of Río Negro and Antarctic sector and Malvinas, etc., 8 IMPERFORATE sheets with the COLOR PROGRESSION PROOFS. They have a small crease at bottom right, virtually insignificant given its excellent appearance and great rarity, possibly UNIQUE! Very low start, less than US$400 each sheet!