2 + lighter imperial yacht unperforated with hand stamp overprint "valueless", in perfect condition mint never hinged outstanding quality without any signs, photo expertize Jäschke-Lantelme BPP (2017) : "in faultless, unhinged mint condition. No engraverãs mark. ", Michel 2. 000.- - very rare! Issued only 100 pieces (a sheet), the 1997 public auctioned was, in many collections missing stamp!