Auction # 2506 WORLDWIDE + ARGENTINA: Special auction Punta del Este Exposition

GREAT RARITY: GJ.1592, 1972 50th anniversary of YPF(Yacimientos Petrolíferos Fiscales), folder with the designs presented by the illustrator H.Viola, including one very similar to the adopted one. Originally they had a value of 25c., and beside the selected design there is an inscription in pencil "This one is very good, couldn't it have a higher value?", eventually the stamp was issued with a face value of 45c., excellent quality, unique and unrepeatable lot!