Vukovar overprint, admission stamp for air fieldpost letters, rouletted with black offset Litho overprint \"island post\", variety \"double overprint\", from right margin of sheet, an in the design of the stamp unprinted small thin spot emerged by which to drop out of an at the manufacture of paper pushed in and overprinted note foreign body - no lack, mint never hinged, very rare stamp, expertized Pickenpack and photo expertize Mogler BPP, Michel 3.000.-