Another technology tycoon, Larry Ellison is spotted with different watches from Rolex to Panerai but the Richard Mille RM005 appears to be his favourite and most valuable one.Launched in 2004, the watch is the brand’s first automatic model with a semi-instantaneous date-change. It features a 37.8mm case in 18k white gold with the brand’s signature skeletonised dial and a black leather band.