To mark what would have been John Lennon’s 85th birthday, Propstore is auctioning off a handful of rare artifacts with ties to the late, great Liverpudlian musician. 

The Lennon collection will be offered during the auction house’s live Music Memorabilia sale in London later this month. The two-day event is expected to achieve $4 million, with over 500 lots from music history set to cross the block.  

The auction standout is a pair of Lennon’s iconic tinted Windsor glasses. The former Beatle wore the prescription spectacles in question throughout his “Lost Weekend” era—an 18-month period from 1973 to ‘74 during which he separated from Yoko Ono and began dating his assistant May Pang. According to Propstore, Lennon was last seen in the specs on March 12, 1974, when he and his close friend Harry Nilsson disrupted a Smothers Brothers show at the Troubadour Club in Los Angeles. The pair—who were both heavily intoxicated, the auction house says—wound up in a scuffle in which Lennon lost his glasses. (They reportedly ended up with the wife of lead singer Tommy Smothers.)

Lennon also rocked the specs on the cover of his “Mind Games” single and in other photographs throughout the period. Round glasses were a part of his iconic “hippie” aesthetic and later became a symbol of counterculture. Many eyewear makers continue to produce Lennon-inspired frames, with the timeless style still wildly popular in fashion today. 

“John Lennon’s tinted Windsor glasses are not only instantly recognisable but also deeply personal, capturing a pivotal moment in his life and career,” Propstore’s music specialist, Mark Hochman, said in a statement. 

Another highlight is Lennon’s Shroud of Tourin artwork. Lennon created the piece while filming Richard Lester’s How I Won the War in Spain in 1966, sketching it in on a scrap of military canvas that he used for shade on set. A parody of the historic Shroud of Turin cloth, the signed self-portrait sees Lennon depicted with two pairs of glasses and the words “Love” and “Hate” on his knuckles, alongside other references to Batman, Elvis, radio, and marijuana. The witty work is expected to sell for between $33,000 and $66,000. 

Other notable lots include a “Give Peace a Chance” and “Remember Love” tapes, a clapperboard from the “I’m Losing You” music video, and a concert poster for the 1969 Toronto Rock and Roll Revival. Lennon collectibles, including his long-lost Patek Philippe and “Help!” guitar, have previously hammered down for impressive (even record-breaking) sums.

The Music Memorabilia auction will kick off on October 23, with a live sale at the Cumberland Hotel. The following day, Propstore will hold an online auction dedicated to Oasis with over 170 lots of memorabilia from the beloved Britpop band. You can view the full catalog here.