USA #C13 #C14 #C15 Very Fine Used Zeppelin Set. For Oversized Lots i. Sheets, Large Covers, Etc. The item “USA #C13 #C14 #C15 Very Fine Used Zeppelin Set” is in sale since Wednesday, May 2, 2018. This item is in the category “Stamps\United States\Back of Book\Air Mail”. The seller is “citystampmontreal” and is located in Montreal, Quebec. This item can be shipped worldwide.