An auction went down recently to raise awareness and money for muscular dystrophy research, and during the auction, a watch created by Swiss watch brand Patek Phillippe for the event sold for $31.1 million.

According to reports, this is the most expensive watch ever auctioned. The watch features 18-karat gold dial plates, a hand-stitched alligator leather wristband, along with rose gold and black reversible face. According to reports, this watch is one of a kind and literally has the inscription “the only one.”