554 ARGENTINA - GENERAL ISSUES Auction #2311: ARGENTINA: very attractive auction Block of Four / Cat.#: GJ.825 Fine GJ.825, 20c. UPU Congress, proof in blue (adopted), block of 4 Starting Price: US$ 20 Current Price: US$ 20 Bid US$ 20 or more Closing: 2023-03-30 22:10:00