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).
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).