The Beatles' official 1962 contract with Brian Epstein is up for auction at Sotheby's London.
The lot is expected to make up to £500,000 ($763,012) in the September 29 sale.
The document dates to October 1962. The band had already signed one contract in January, but it was never signed by Epstein, and Ringo Starr had yet to join.
This is thus the first contract to feature the full line-up.
It offers a fascinating insight into Epstein's management of the band, which included authority over their wardrobes and hairstyles.
In addition, John Lennon has mistakenly signed twice.
The sale will also feature a handwritten and signed copy of 2Pac's lyrics to Ambition Az a Ridah (circa 1995).
It's expected to make £30,000-50,000 ($45,786-76,311).
The market for memorabilia associated with the rapper has increased extensively; Christie's sold the manuscript lyrics for The Case of the Misplaced Mic for $1,554 in 2004.
Earlier this year a set of unpublished letters he sent to a female acquaintance from prison made $59,625 at Bonhams New York.
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