Auction # 2438 ARGENTINA: Special October auction

EXTREMELY RARE VARIETY: (GJ.4505a), 2023 $1,500 El Palmar Lake National Park, block of 4 printed only in black (the other colors are omitted), great rarity of which so far only a sheet of 40 stamps is known that was found at a post office in the south of the country, it will be included in the next edition of the GJ catalog as GJ.4505a with a value of US$250. We include a normal example for comparison