These are the most expensive watches of the 7 richest billionaires – Humblest of all, Bill Gates wears a $1,200 Tag Heuer whereas Elon Musk’s Richard Mille costs more than two Tesla Model S cars and trumping them all is the $6.5M Patek Philippe of the world’s richest man
byForbes recently released its list of the world’s 10 richest people, with Bernard Arnault, Elon Musk and Jeff…