Treskilling Yellow
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The Treskilling Yellow, or three schilling banco error of color, is a Swedish postage stamp of which only one example is known to exist. This stamp was cancelled at Nya Kopparberget, about 150 kilometres from Uppsala, on July 13, 1857. It was last... Wikipedia
Country of production: Sweden
Date of production: 1855
Estimated value: At least 2,880,000 Swiss francs or $2,300,000; (last known sale price 1996); €1.5–2 million; (estimate in 2010)
Face value: three Swedish skillings