With so much money to spare, you would be surprised to find out the kind of watch billionaire Li Ka-Shing wears. For him, his preferred watch is a very simple one that doesn't cost as expensive as a Rolex or any other famous timepiece.

With an estimated net worth of $28 billion, he's wearing a modest Citizen Eco-Drive watch.

The watch is priced around $400, and is set 30 minutes early because he never wants to be late.

Very modest indeed.