Auction # 2305 ARGENTINA: Special February auction

GREAT RARITY and recent find: GJ.1685SG (future catalog number), 1975 1.20P. Province of Santiago del Estero PRINTED ON GUM (UV neutral front, phosphorescent back), corner block of 4, ONLY 4 known stamps. I found this spectacular piece (only one) while going through the stock of a collector who passed away many years ago. The rest of the stamps of this sheet were probably sold and are part of some collection, or are lost forever! Unique opportunity to have this unique block of 4!