The Tiffany bowl rests on three exquisitely crafted polar bears standing on a jagged ice formation.
It was originally made as a gift from the employees of the Great Western Railroad of Canada as a token of respect for their boss, Charles Brydges, a Londoner who became managing director of the company in 1852.
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Hide AdLast year the bowl, valued at up to 20,000, turned up at the valuation desk at Bonhams Edinburgh where, the auctioneers said "its value and appeal were instantly recognised".
A spokesman said: "Its history is fascinating, but now the bowl is heading home." It will be auctioned in Toronto in November.
Clare Blatherwick, Bonhams' silver expert in Scotland, said: "This bowl is wonderful. It is a perfect museum-quality piece of Tiffany in its own right, but its intriguing history lifts it to another plane and it really deserves a setting where the public can appreciate it."