3, 5 and 12 H horizontal pairs from of the right lower corner of the sheet with red respectively violet overprint 6, 12 respectively 24 H within, impeccable mint never hinged, in each case in the lower margin of sheet twice signed Mikulski, as well 3 attest copies Mikulski. Michel 900.- for hinge, mint never hinged rare! (4/6(2)) Certificate (Image 1) (Image)