A couple in Wales discovered a 1911 Titanic advertisement while renovating their home.
It is one of the few original posters left, the Daily Mail reports.
The lithographic prints advertising the ship were withdrawn when the Titanic sank on April 15, 1912, only a few days after it began its maiden voyage on April 10, The History Channel’s website reports.
The disaster killed 1,522 people. It took until 1985 to find the wreckage of the ship in the North Atlantic.
The rare poster was hiding on the back of painting behind a false wall in the house. It will go up for auction in the U.K. on April 23 and is expected to fetch $5,000.
Marine artist Montague Birrell Black painted the colorful piece, which features an image of the ship looking grand in comparison to the small boats sailing nearby.
“It is frayed at the edges and is missing a section at the bottom for the travel agents but it one of just a handful left,” elaborated Andrew Aldridge, of Henry Aldridge and Son of Devizes, Wiltshire, the auction house selling the piece.
Aldridge says even he was surprised by the discovery.
“I have come across people finding treasures in the attic but not behind a false wall,” he noted.
In addition to this piece, the auction house will also be putting up two other posts from the era for bids.
Valued at roughly $17,000, another poster by Black features the Titanic and its sister ship, the Olympic. It is the largest of the three and in good condition.
The third piece is the smallest and is by a different artist, James Scrimgeour Mann. It features one of the ships lit up at night. It should bring around $7,000 at auction.
“'These three lithographic prints form the set of three advertising posters for the Titanic and Olympic created for White Star Line in about 1911,” explains Aldridge.
“They are very rare now because they are obviously over 100 years old but also they were scrapped after the Titanic disaster,” he added.