Left part sheet from 2 strip of five with upper- and lower margin the postage due stamp over 6 Din. In mint never hinged condition with blank fields in stamp size, the oblique cut in are, so that the complete perforation the blank fields over the length of the left margin of sheets not stuck becomes. Only the upper blank field is complete perforated. Rare, certificate Brunel (20L) Certificate (Image 1) (Image)