1750 PORTUGAL - GENERAL ISSUES Auction #1822: WORLDWIDE + ARGENTINA: Early Winter General Auction! Single / Mint O.Gum (LH) Cat.#: Sc.503 VF. Sc.503, imperforate PROOF in black, very fine quality! Starting Price: US$ 10 Current Price: US$ 10 Bid US$ 10 or more Closing: 2018-06-28 22:25:00