2 + H. Imperial yacht with overprint "G. R. Maffia" in blackish violet, in perfect condition mint never hinged, superb in every respect (choice copy), rare stamp, issued only 140 piece, expertized Hofmann-Giesecke with photo certificate "the 2 + Heller-stamp and Your violet overprint is genuine and immaculate and at certain features as original discernible. ", Michel 500.-