Mystery buyer pays £300 for 1950 poster of Portstewart
A rare railway poster advertising Portstewart as a holiday destination has sold for £300 at an auction in America.
The poster, produced by British Railways in 1950, is the work of prolific London-born poster artist Montague Birrell Black.
In the early and middle parts of the 20th century, when comparatively few people owned cars, railway companies commissioned artists to produce eye-catching posters to boost rail travel throughout the United Kingdom.
Before the sale, at Swann Auction Galleries in New York on Wednesday, the poster had been expected to fetch between £300 and £450.
In the end, it was snapped up by a mystery bidder for £300.
Among the companies which hired Montague Birrell Black to produce advertising posters was the White Star Line, owners of the Titanic.