“Trondheim” block is the largest known multiply of the first Norway’s postage stamps. This impressive philatelic item was discovered at Trondheim’s Central Railroad Station, affixed to a parcel of documents to the USA which had been returned as undeliverable – and then forgotten for about 75 years! “Trondheim” block is without doubt the most remarkable philatelic item of Norway, and one of the most important world rarities. It was first exhibited at the 1930 Oslo International Philatelic exhibition, and confirmed the recently published plating of the 1855 4 Skilling by Jellestad and Odfjell. This outstanding philatelic item was offered at David Feldman auction for $1,700,000 in April, 2008.