Los-Nr. 760

10 öre on 12 öre blue, perforated 14 instead of 13, nice fresh colour and quite well centered, unused with original gum (gum structure slightly changed for climatic reasons), one of the greatest rarities of Swedish philately with only 50 copies printed and 3 unused copies recorded, sign. Strandell, certificate Dr. Helena Obermüller Wilen (1994)