The Most Expensive Auctions In History

  In 1855, Sweden issued its first postage stamps, in a set of five values depicting the Swedish coat of arms, with denominations ranging from three to 24 Swedish skillings. The three-skilling stamp was normally printed in a blue-green color, with the eight-skilling stamp being printed in yellowish-orange. It is not known exactly what went wrong, but the most likely explanation is that a stereotype of the eight-skilling printing plate (which consisted of 100 stereotypes assembled into 10 × 10 arrays) was damaged or broken, and it was mistakenly replaced with a three-skilling. The number of stamps printed in the wrong color is unknown, but so far only one example has been found. Somehow, this error went entirely unnoticed at the time, and by 1858 the Swedish currency was changed. The skilling stamps were replaced by new stamps denominated in "öre". In 1886, a young collector named Georg Wilhelm Backman was going through covers in his grandmother's attic at the farm Väster Munga Gård north of Västerås and came across one with a three-skilling stamp, for which the Stockholm stamp dealer Heinrich Lichtenstein was offering seven kronor apiece.