Subscribe | UPI Odd Newsletter Subscribe LONDON, May 13 (UPI) -- The world's most valuable stamp -- the Treskilling Yellow -- is expected to fetch as much as $7.4 million at an auction in Switzerland, collectors said. The stamp issued in Sweden in 1855 was saved by a Swedish boy who found it in his grandmother's trash bin in 1885. He sold it to a collector for less than $1, The Daily Telegraph reported Thursday. Advertisement The Treskilling Yellow since has changed hands many times, each time setting a record price, including at its last sale in 1996 when it sold for $2.5 million to anonymous collectors. The stamp was made rare when it inadvertently was printed in yellow instead of green. Presumably, other stamps were printed in the same batch, but none has surfaced. The Treskilling Yellow is on display this week at London's Festival of Stamps and is to be auctioned off in Geneva next week.
