Check the listing for details. UNITED NATIONS (UN) Postal Stamps 20c (Outer Space Exploration TKS351*. Color: Multi-Color, Made in United States. Listed at 3.99 USD. This listing is for a set of United Nations (UN) postal stamps featuring a design of Outer Space Exploration. The stamps are 20c each and are ungraded and uncertified. They were issued between 1960-1989 and have a denomination of various currencies. These stamps have been previously used and cancelled on the first day of issue. The cancellation type is First Day of Issue. The design of the stamps features a theme of United Nations and space exploration, with a focus on UN organizations. The color of the stamps is multi-colored and they were manufactured in the United States. This is a great addition to any collection of worldwide stamps and is perfect for those interested in UN organizations and space. Thank you for considering this item.