Famous Canadian error stamp to make $13,500?

A valuable example of Canada's most famous error stamp is coming to auction.

Inverted Seaway
One of only 400 produced

The "Inverted Seaway" - a 5c error from 1959 - has a $13,500 estimate ahead of its sale at Vance Auctions in Ontario, Canada on October 15.

This lightly cancelled stamp is one of an estimated 400 produced. Mint examples can achieve up to $16,000.

The stamps celebrate the opening of the St Lawrence Seaway in 1959, which enables large ships to navigate from the Atlantic to the Great Lakes.

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