UNITED STATES C-14 used. Used – clean back. Sound stamp – no thins or tears. The free listing tool. The item “US C14 used $1.30 GRAF ZEPPELIN” is in sale since Saturday, April 13, 2019. This item is in the category “Stamps\United States\Back of Book\Air Mail”. The seller is “gemada*stamps” and is located in Salem, Oregon. This item can be shipped worldwide.