This set of 6 mint never hinged stamps from Liberia, Sc#663-668, commemorates the 100th anniversary of the Universal Postal Union. The stamps feature historical events related to postal services and are in extremely fine/superb condition. The stamps are from Liberia, a country situated in Africa, and have not been certified. They were produced in Liberia and are of the postage type. These stamps are a great addition to any stamp collection and are a must-have for any stamp enthusiast.