This rare block of 9 Washington stamps with an error is a must-have for any stamp collector. With a denomination of 5 cents and original gum quality, it is a unique piece of United States history. The XF (Extremely Fine) grade and the fact that it is MLH (Mint Lightly Hinged) make it even more valuable. This block of stamps was manufactured in the United States and has not been certified, adding to its authenticity. It is a great addition to any collection and a conversation starter for anyone who appreciates rare stamps.