It is no secret that former professional boxer Floyd Mayweather loves bling. He even writes about his jewelry purchases on Instagram. That is where many learned of his most recent purchase: Jacob & Co.’s $18 million Billionaire diamond tourbillon watch.

First introduced to the world in 2015 at that year’s Baselworld, the Billionaire timepiece is a one-of-a-kind watch that Jacob Arabo created in affiliation with Flavio Briatore and his Billionaire Lifestyle SARL company.

Why Floyd Mayweather Is Taking On The World Of High End WatchesWATCH2:34

An exceptionally extravagant timepiece, the Billionaire is set with 260 carats of emerald-cut diamonds. The bold cut enhances the brilliance of the diamonds, which are set in an inverted pyramid style. The entire 18-karat white gold case and bracelet of the watch is diamond-set with stones that weigh as much as three carats each.

The Billionaire watch features a rectangular case and dial with a skeletonized movement equipped with a tourbillon escapement that is constantly in motion when on the wrist. The tourbillon compensates for errors in timekeeping due to the effects of gravity when the watch is in certain positions on the wrist. The JCAM09 caliber consists of 167 components and offers 72 hours of power reserve.I doubt Mayweather cares too much about the power reserve, though. On his Instagram post he even credits the Japanese jeweler from whom he bought the watch, stating he wouldn’t go anywhere else for his jewelry again.

The Jacob & Co. Billionaire watch that Mayweather purchased is unique, although Arabo (founder of Jacob & Co.) said he would make other watches similar to it using different stones. At this year’s Baselworld, he introduced the Millionnaire (spelled with two “n”  s) watch – similar in look but entirely set with 260 carats of yellow diamonds.

Jacob & Co. is known for its elaborate diamond and gemstone jewelry that features top-quality gemstones in boldly beautiful settings meant to captivate at first glance. Now that the brand is also an important watch maker — with many a cutting-edge complicated watch  in its repertoire — it stands to  reason that the brand would accentuate its finest timepieces with the finest jewels in the world.