681 ARGENTINA - AIRMAIL Auction #2317: WORLDWIDE + ARGENTINA: Special May auction Multiple / Cat.#: GJ.636 Ave-Fine GJ.636, 5c. Biplane flying over the globe, 2 PROOFS in the issued color, one printed on chalky cardstock and the other one on thin unsurfaced paper (not catalogued by Kneitschel), VF and rare lot! Starting Price: US$ 25 Current Price: US$ 66 Bid US$ 73 or more Closing: 2023-05-11 22:25:00