A painting of Ringo Starr rescued by a former cleaner at The Cavern is estimated to be worth £5, link 000.
The piece was salvaged by Hal Morris when the original Mathew Street club was closed down in 1973 and has been valued ahead of an event at The Beatles Story.
The original portrait of the Fab Four drummer deep in thought was painted by artist Pete Williams as he sat next to John Lennon in the original Cavern Club.
Although Lennon is not featured in the painting, find there is a rough sketch of him wearing his famous spectacles on the reverse side along with the artist’s signature.
The portrait of Ringo, see hung on the wall of the Cavern before its closure in March 1973, was hidden away in a drawer at Hal’s Ainsdale home for more than three decades before it was re-discovered a few months ago.
He said: “I am absolutely flabbergasted that the painting is worth so much!
“It was given to me by a builder who was starting to take things down when the Cavern Club closed in March 1973 and it’s been hidden away in a wardrobe at home ever since.
“It would have just ended up in a skip and been lost forever if I hadn’t taken it with me the day the Cavern Club, where I used to clean, closed its doors for the last time.”
Experts from Julien’s Auctions are set to value a wide range of pieces during the event on Wednesday, October 26 at the Albert Dock venue.
They will include a letter from John Lennon to The Queen explaining why he returned his MBE.
A 1962 Star Club promo card signed by all four Beatles, a Fab Four dress made in 1964 and a collection of dresses belonging to George Harrison’s former wife Pattie Boyd are also set to be assessed.
Members of the public are being urged to scour their attics and garages for any original Beatles memorabilia that may have been kept hidden away for decades.
The Memorabilia Day at The Beatles Story will take place from 2-9pm on October 26. To pre-book a free face-to-face valuation, visit www.beatlesstory.com.