A guitar heard on iconic Pink Floyd albums sold for a record $3.975 million at auction Thursday, and Jim Irsay is the instrument's new owner.

The Indianapolis Colts owner picked up three items at the David Gilmour Guitar Collection auction at Christie's New York salesroom:

A 1969 black Fender Stratocaster known as "The Black Strat" for $3.975 million.

A 1969 Martin D-35 acoustic guitar for $1.095 million.

The travel case used for "The Black Strat" for $175,000.

Irsay's $5.245 million in purchases made up 24% of the auction's $21.491 million in sales. Gilmour, who became a member of Pink Floyd in 1967, sold more than 120 guitars, amplifiers and the travel case.

Gilmour announced Wednesday he is donating all proceeds from the auction to ClientEarth, an environmental law organization with an announced mission of fighting climate change.

Larry C. Hall, vice president of special projects for the Colts, sat in the front row at Christie’s and served as Irsay’s proxy during bidding.

“There was incredible energy in the room,” Hall told IndyStar, mentioning that applause greeted the sale of each of the 127 items.

Before the auction, Christie's projected a sale price of $100,000 to $150,000 for "The Black Strat." The instrument's $3.975 million price shattered expectations and eclipsed a previous guitar auction record of $2.7 million — paid in 2005 for a Stratocaster to raise funds for Asian tsunami relief. That guitar was signed by Mick Jagger, Keith Richards, Eric Clapton, Jimmy Page, Pete Townshend, Jeff Beck, Gilmour and other musicians.

“It was a major purchase, obviously,” Hall said of Gilmour’s Stratocaster. “But knowing those funds are going to charity, via David Gilmour, warms my and Jim Irsay’s heart.”

Irsay tweeted about the guitar's legacy:

"The incomparable David Gilmour ... the greatest 'phrasing' guitarist in the world!! Honored to bring The Black Strat to the public. The most expensive guitar EVER purchased. And for charity!!!"

Gilmour played the guitar during the recording of Pink Floyd albums "The Dark Side of the Moon" (1973); "Wish You Were Here" (1975); "Animals" (1977); and "The Wall" (1979).

He played the Martin D-35 acoustic guitar on the title track of "Wish You Were Here."

The guitars are the latest additions to Irsay's instrument collection, which already boasted an orange 1963 Gretsch guitar once owned by John Lennon (purchased for $530,000 in 2015) and the "Yellow Cloud" guitar played by Prince (purchased for $137,500 in 2016).

Three items from Irsay's collection are on display at New York's Metropolitan Museum of Art as part of an exhibit titled "Play It Loud: Instruments of Rock & Roll."

The show, which runs April 8 to Oct. 1, includes Jerry Garcia's "Tiger" guitar (purchased by Irsay for $957,000 in 2002); the Stratocaster Bob Dylan played when "going electric" at the 1965 Newport Folk Festival (purchased for $965,000 in 2013); and the bass drum head used by Ringo Starr when the Beatles debuted on "The Ed Sullivan Show" in 1964 (purchased for $2.125 million in 2015).

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Call IndyStar reporter David Lindquist at 317-444-6404. Follow him on Twitter: @317Lindquist.