25 Pf dark orange, left upper corner of the sheet with plate flaw \"left upper corner bevelled\" in perfect condition unused with full original gum and hinge trace. Photo expertize Dr. Hartung: \"very well perforated and in faultless, unused condition. The plate flaw is rare! He comes in a small part of issue on position 1 before and has me so far only on the dark orange variety produced. \" very rare plate flaw!