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4 sk. 1858 V printing 1861, burelage IIa. The burelage was always ment to be on the same side as the stamp imprint itself. The printing process was first to print the watermarked paper sheet with the burelage, when ink was dry, the printing of the stamp design above the burelage was made. Only a very few times, the burelage printed sheet were mixed up and the stamp imprint actually was printed on the other empty side of the paper sheet, thus one side has the burelage, the other the stamp imprint. A true Danish gem of the squared issue in mint condition, extremely rare.