This US Scott #C30 plate block features a denomination of 30 cents and was issued between 1941-1950 in the United States. The stamp is of high quality, being mint never hinged and graded as XF (Extremely Fine). It has a beautiful blue color and depicts an aviation theme. The plate block # 22774 is located in the lower right corner. This stamp is perfect for collectors of air mail, back of book, United States, and stamps in general. It is uncertified but has been well-preserved and is in excellent condition.