Jacob & Co.’s $7m Billionaire Ashoka Watch isn’t the jeweler’s first “death by diamonds” timepiece. Nor is it their most expensive. That honor belongs to the $18m Billionaire’s watch. Purchased by boxer Floyd Mayweather in June 2018, that diamond-happy horological happenstance held 239 sparklers. The Ashoka redo makes do with a mere 62 diamonds. Yes but . . .