This stamp features Theodore von Karman, a renowned aerospace scientist, and is in mint unused condition. It has a denomination of 29 cents and was issued between 1991-2000 in the United States. The stamp showcases a multi-color design with a science-themed topic. It is ungraded and has no gum. The stamp has not been certified but is in excellent quality. This stamp is a great addition to any collection and is perfect for those interested in science and aerospace.