Thomas Perazzi, head of watches at auction house Phillips Asia, told Reuters that it is "the highest result" for any wristwatch that once belonged to an emperor.

It was one of only eight known Patek Philippe Reference 96 Quantieme Lune timepieces and was gifted by Puyi to his Russian interpreter when he was imprisoned by the Soviet Union, the auction house said. It easily beat a pre-sale estimate of $3 million.