5 Mark imperial yacht on paper watermarked 1 (lozenges), peace printing, 26 : 17 perforation holes, corner margin top left (rest of hinge and prefolded), stamp mint never hinged, very fine, unsigned, photo expertize Carsten Brekenfeld BPP "genuine and immaculate", Michel 400.- - hopeless undervalued, have we already between 400 - 650 Euro multiple slammed!