30 lighter imperial yacht unperforated, in perfect condition mint never hinged without any signs, photo expertize Steuer VÖB: "mint never hinged, at the stamps under margin outside of the stamp design horizontal trace of crease. . Qualitatively perfect", Michel 2.000.- - very rare! Issued only 100 pieces (a sheet), the 1997 public auctioned was, in many collections missing stamp!