CANADA – 1959, St. Lawrence Seaway invert – Worth US.$13,500

The St.Lawrence Seaway Invert is one of the best known errors in Canadian stamp history. It features the St.Lawrence Seaway with an inverted center. This stamp was issued at the time of the opening of the St.Lawrence Seaway in 1959, which enables large ships to navigate from the Atlantic to the Great Lakes. As per records around 200 copies of these inverted center stamps exist today. Also known as Inverted Seaway of 1959, On October 15, 2015 at Vance Auctions in Ontario, Canada this stamp fetch US.$13,500.