4 Mark national coat of arms, variety \"glued paper sheet\", vertical pair from upper right corner (field 10 / 20) and vertical strip of six (field 30 / 40 / 50 / 60 / 70 / 80) the time an unit formed, mint never hinged, faultless condition, very rare, photo expertize Dr. Helmut P. Oechsner BPP \"perfect\"