Treskilling Yellow

Treskilling Yellow
Country of productionSweden
Date of production1855 (1855)
Nature of rarityColour error
No. in existenceone
Face valuethree Swedish skillings
Estimated valueAt least 2,880,000 Swiss francs or $2,300,000
(last known sale price 1996)
€1.5–2 million
(estimate in 2010)

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.