ZURICH - The world's most valuable single postage stamp, a Swedish three shilling yellow issue from 1857 known as the "Treskilling Yellow", was sold at public auction yesterday for a record 2.875 million Swiss francs (£2.26 million).
Swedish stamp sold for £2.26m
ZURICH - The world's most valuable single postage stamp, a Swedish three shilling yellow issue from 1857 known as the "Treskilling…
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