This 48 18 cents US stamp sheet with the theme "Benefiting Mankind" is a great addition to any stamp collection. The stamps feature colorful and detailed illustrations of NASA's achievements in the field of space exploration. The sheet is in mint never hinged condition and was issued in 1981 in the United States.Each stamp depicts different themes like the first manned spacecraft, the first men on the moon, the first space station, and many more. The sheet is ungraded and uncertified, making it an affordable option for collectors who are looking to expand their collection. This stamp sheet is a must-have for any space enthusiast or stamp collector.