A Nobel Prize presented to physicist Leon Lederman has sold for $760,000 at Nate D Sanders.
The lot headlined an online memorabilia sale that closed on May 28.
Lederman received the medal in 1988 for his 1962 discovery of the muon neutrino - a subatomic particle. He is the second person to have auctioned a Nobel Prize during his own lifetime.
The other, biologist James Watson - a member of the team that discovered the structure of DNA - sold his at Christie's last year.
It was bought by Russian billionaire Alisher Usmanov, who promptly returned it to him with the words: "Dr Watson's work contributed to cancer research, the illness from which my father died.
"It is important for me that�Ǫ the medal will stay with the person who deserved it. I wouldn't like the medal of the distinguished scientist to be an object on sale."
The first ever Grammy award, dating to 1958 and awarded to The Champs for Best R&B Performance for their song Tequila, sold for $62,500.
It was one of only 28 awards presented that year and comes with an original programme from the event.
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