The Bolton boxer, aged 20, has revealed that the timepiece set him back "£90,000 plus".
Amir, who sported his new watch for a celebration of the Spirit of Sport statue in Bolton on Sunday, says it is from American jeweller to the stars, Jacob & Co, and was custom-made to his exact requirements.
Jacob watches have adorned the wrists of some of the world's most famous showbiz names, including Madonna, Sir Elton John, David Beckham, "It" girl Paris Hilton and rap sensation P Diddy.
The brand has featured on the pages of glossy high-fashion magazines across the globe, making designer and founder, Jacob Arabo, the man to go to for celebrity jewels.
The New York-based jeweller grew up in Russia and moved to the USA at the age of 16 He enrolled on a jewellery course and in 1986 opened his business and began designing products under his brand, Jacob & Co.
advertisementIn the mid-to-late 1990s, many music industry icons were taken by Arabo's unique creations.
Personalities such as Whitney Houston and Mary J Blige recommended him to a host of their friends, spawning a buzz throughout the music industry.
Amir's new status symbol is his most expensive buy - apart from his Lostock home - and shades the £87,000 he paid for his other superstar accessory, a customised BMW M6 convertible.
London-based stylist, Ceril Campbell, has dressed stars for the red carpet and penned celebrity style secrets book, Discover the New You.
She said: "Amir's watch is very cool and on-trend. It's the status symbol of the moment.
"He's bought into a sorority of celebrity wearers.
"Jacob owners are not shy and retiring people and the watch really says something about them, their style and their success. And, of course, it's full of bling."
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