The first production model Fender Stratocaster guitar has sold for $US250,000 ($A270,635).
George Gruhn of Nashville sold the 1954 guitar on consignment for owner and guitar historian Richard Smith.
Gruhn, who owns a Nashville guitar shop, says the buyer wanted to remain anonymous.
But he said the private collector lives in the United States and is not a professional musician.
Gruhn also encouraged the buyer to contact the Musical Instrument Museum in Phoenix about displaying the guitar.
"I think it would be great if periodically he would loan it out," Gruhn said.
"I would hate to think that it would spend the next 40 or 50 years completely out of sight and not seen or heard."
Gruhn said the guitar was shipped and the purchase finalised this week.
The sunburst-finish Strat bears the serial number 0100.
Although some Strats have lower numbers that begin with 0001, Gruhn says they actually were manufactured later in that first year of production.
He says the number-one Strat was originally sold to an amateur who took good care of it.
Smith purchased the guitar from the original owner, and Gruhn said Smith was very pleased with the sale.
The Fender Stratocaster, first produced in 1954, has been described as a guitar that changed the world.
Buddy Holly played one. So did Jimi Hendrix, a decade later, when he transformed the psychedelic experience into sound.
Bob Dylan chose a Stratocaster for his revolutionary electric set, when he fired a defiant shot at tradition during the 1965 Newport Folk Festival.
