Treskilling Yellow

The Treskilling Yellow, or three schilling banco error of color (Swedish: Gul tre skilling banco, literally "yellow three skilling banco"), is a Swedish postage stamp of which only one example is known to exist. The stamp was cancelled at Nya Kopparberget (now known as Kopparberg), about 150 kilometres (93 mi) from Uppsala, on July 13, 1857. It was last sold in 2013.

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