Mr Aldridge said he expected it to sell for between £6,000 and £10,000.
“It will be of interest to two different kinds of people: Titanic specialists, of course, but also stamp collectors who like postmarks. This one, dated ‘Cork 3.45pm April 11 1912’ is exceptionally rare.”
The lettering in swirling ink is slightly unclear, but the card appears to be addressed to Mrs Olive Dakin of 2 Albemarle Place, Newmarket Road, Norwich.
Certainly there is still an Albemarle House on that street.
John Balls, chairman of The Norfolk Titanic Society and author of two books on the tragedy, said he remembered the postcard previously coming up for sale in the 1990s.
“There was lots of interest then and I expect there will be this time round, too,” he said.
“And, of course, it may be that the publicity around the sale prompts relatives of the lady with the Norwich address to come forward.”
Henry Aldridge & Son specialises in Titanic memorabilia, holding auctions twice a year.
In April it sold a gold pocket watch worn by the ship’s wealthiest passenger for £900,000 – six times the asking price.
