Antiquorum auctioned off Albert Einstein's 1930 Longines wristwatch on Thursday.
The house estimated the watch would fetch up to $35,000. It went for $520,000. (With fees, the total came to $596,000.) That's over 2000% higher than the estimated price, and a record for any Longines at auction.
The watch is inscribed to "Prof. Albert Einstein," and is also marked with the date on which it was presented to him, February 16, 1931.