An oil painting by Northern Ireland artist William Scott, which inspired the design of an Irish postage stamp, is set to fetch around £400,000 at auction.
The five feet by six feet picture, titled Berlin Blues 2, was painted by Mr Scott in 1965 and later chosen to illustrate a 1973 five pence postage stamp in the Republic.
It is now expected to sell for between £350,000 and £450,000 at Sotheby's in London on June 12.
At the same auction, another Scott painting, titled Dark Earth Scheme, is set to fetch between £200,000 and £300,000.
William Scott was born in Greenock, Scotland, on February 15, 1913.
He and his family moved to Enniskillen in 1924. He was educated at Enniskillen Technical School before training at Belfast College of Art.
His importance as an artist was officially recognised in 1984 when he was elected to the Royal Academy in London. There is a commemorative blue plaque to Mr Scott at his former home at Queen Street, Enniskillen.
Mr Scott was 76 when he died on December 28, 1989.