THE STAMP IS MINT-OG/NEVER HINGED--XF. Thanks for looking and please check out my other items. The item "#C4 BLOCK OF 4 WITH SIDEROGRAPHERS INITIALS 1923 8c AIRMAIL ISSUE MINT-OG/NH-XF" is in sale since Wednesday, May 8, 2019. This item is in the category "Stamps\United States\Back of Book\Air Mail". The seller is "45dryan" and is located in Apache Junction, Arizona.This item can be shipped worldwide.