3 Pfennig to 50 Pfennig Crown / Eagle with a steep, black printing imprint "Marshall Islands" as a so-called Berlin proof print, 1898/99 produced for exchange and trade purposes of the Imperial Post Office, complete set of six values from the corner margin or upper margin, mint, flawless condition, examined by Albert Friedemann, Richter or Bothe BPP, two photo certificates Ronald F. Steuer BPP "in perfectly mint condition.", Michel 9,000.-