50 Pfg black green, perforation C, horizontal strip of three from of the right upper corner of the sheet with four place red counting number on the right margin of sheet overprinting. The scarce unit is unused with original gum without hinge or hinge trace and point at visible three tiny tiny stain spots on and the margins are a little toned. Michel value 3. 600.- for perfect mint never hinged. Certificate with photograph A. Schlegel BPP