Sweden. Facit 179Acxz used, 20 öre violet with wmk lines+KPV. Well-centred, fresh and beautiful copy without any faults, cancelled in 1921, with signature and certificate by Menzinsky. Of the only two known examples of this extraordinary rarity, this is in a class of its own. A FANTASTIC EXHIBITION ITEM. Ex. Skandinavisk Filateli 1989. The other known copy, Ex. Beckeman, was recently sold for 120.000+ %.