A hand - written letter John Lennon penned to television host Joe Franklin about his wife's solo album sold for over $28,000 at an auction in Boston on Thursday, The Inquistr reported.

The letter was crafted in 1971 on Apple Records stationary, shortly after Yoko Ono's album, Fly, was released. He brags to the television host about his wife's talents and asked Franklin to listen to the album.

"Of course Yoko can explain her music better in person, this is a kind of introduction. For something rather more 'straight,' a track called 'Mrs. Lennon' on Fly is an example of her more conservative side," Lennon writes, according to Rolling Stone. "She was trained as a classical musician, and took music composition in Sarah Lawrence College as her major. It's far out, but don't let it frighten you."

The Oct. 24 auction displayed other pieces of valuable Beatles memorabilia, including stock transfer sheets signed in 1969 by each Beatle member, selling for over $16,000 each. Any items with the British icons' signatures from 1969 are very rare and sell for a high price.

About 350 items of original classic rock items were auctioned off, including Beatles ticket stubs, autographed "Stairway to Heaven" sheet music by Led Zeppelin and a guitar used by Neil Schon of Journey.

Dee Dee Ramone's Fender Precision bass guitar used during performances in the 1980s was the most sought after item in the auction. The autographed bass was grabbed for just under $38,000.