139 ARGENTINA - POSTAL HISTORY Auction #2503: ARGENTINA: Special February auction Cover / Cat.#: Fine Official cover sent from CASTELLI to Buenos Aires on 2/AP/1878, with the blue marks "SIN CARGO" (straightline) and rectangular datestamp of CASTELLI, on back "EST. AMBULANTE F.C.S. - (B.A.) Nº6" for 3/AP, with opening defect but very nice and rare! Starting Price: US$ 200 Current Price: US$ 200 Bid US$ 221 or more Closing: 2025-02-06 22:10:00