UN1-11 - 1951 N.Y. U.N. Headquarters, Fla - Mystic Stamp Company,UN Stamps Collection United Nations 1951-1977, All MNH, 440,1951-1960 Year of Issue Worldwide United Nations Stamps for,UN NY 1951-59 United Nations Stamps C1-C7 Airmail MI Block,UN United Nation NY Stamps Flag Series 1987 499-514 MNH | eBay