We strive to describe the items as accurate as we can. This item is in the category Stamps\United States\Back of Book\Air Mail. Momen us stamps #c13-c15 graf zeppelin mint og nh vf lot #73850 #1/10 means incomplete set from 1 to 10. Unlike other sellers if there is any fault with the stamps it will be noted in the Lot Description Area above, if we do not mention any faults in the description, then the item is fault-free.