Elvis Presley's first recording is among the memorabilia being auctioned on what would have been his 80th birthday.

In 1953, Presley walked into Sun Records in Memphis, Tennessee, and recorded the song My Happiness, aged 18.

For four dollars, Presley was able to take with him an acetate copy of the 78 RPM record, meant as a gift for his mother Gladys.

But, as the story goes, Presley stopped at a friend's house to listen to it first and left the record there. The acetate sat in his friend's safe for decades.

It will be auctioned off at Graceland - the late singer's home-turned-museum in Memphis - along with other Presley-related memorabilia on what would have been his 80th birthday.

The acetate is in original condition and the record is playable.

"I'm hoping that somebody who loves Elvis Presley and is a huge Elvis Presley fan and who can appreciate the record ... ends up with it," said Lorisa Hilburn.

She is the niece of the late Ed Leek, Presley's friend and caretaker of the record the singer left at Mr Leek's house more than 60 years ago.

Ms Hilburn, who lives in Rockledge, Florida, said she inherited the record from her uncle Ed and aunt Sue after her aunt died last summer. She said her uncle kept the record, which he had authenticated, in a safe when the couple lived in Memphis and Florida.

Mr Leek tried to auction off the record in the 1980s, but never actually sold it, Ms Hilburn said. Her decision to contact Graceland and auction the record has led to a likely windfall. She notes that the starting bid for the record is 50,000 dollars (£33,000).

"We didn't know he still had it," Ms Hilburn said. "It just sat in the safe. Nobody in the family ever saw the record."

The record is highly valued because of its place in the career of Presley, who in 1954 recorded That's All Right, also at Sun Records.

That's All Right became Presley's first hit and it catapulted him to a successful career that included hit songs such as Hound Dog and Suspicious Minds, and to making popular films such as Jailhouse Rock.

Presley's unique style, his hip-shaking dance moves and rebellious image made him a rock and roll pioneer. He died in Memphis on August 16 1977, aged 42.

Before he became the King of Rock n' Roll, Presley was a shy young man who had moved to Memphis from Tupelo, Mississippi, with his parents. He liked to sing and one day summoned up the courage to go to Sun Records, owned and operated by Sam Phillips.

Phillips was not there that day in 1953, so Presley was helped by Phillips's assistant, Marion Keisker. Presley sang the ballads My Happiness, which was the A-side of the record, and That's When Your Heartaches Begin, which became side B. Both are slow-moving and stop well short of suggesting a singer ready to help open the way for the emergence of rock and roll.

After the record was cut, Keisker wrote Presley's name and phone number down and jotted a note that said he was a good ballad singer.

The story about the My Happiness recording is told to visitors who take the tour of Sun Records, now a museum. Along with Presley, Phillips also recorded music legends Johnny Cash, Jerry Lee Lewis and Carl Perkins at Sun.

Jayne Ellen Brooks, public relations director at Sun, says the My Happiness record is important because it gives fans the first glimpse of Presley's impressive talent.

"This was a pop ballad song done by female singers, so as far as the song choice goes, it's really interesting," Brooks said. "It sort of sums up Elvis, pre-fame."