http://www.fastcodesign.com/1673042/kickstarting-a-watch-that-lets-you-tell-time-by-feel#1

The act of people glancing at watches to tell time is already potentially on its way to extinction, as the devices we rely on as timekeepers aren’t necessarily strapped to our wrists. A new invention introduces an original alternative to looking to phone or watch for the time: The Bradley is an extra-sensory tactile watch that lets users “feel” time.

A piece with magnetic ball bearings that rotate around the watch in circular channels: minutes on the face, hours on the outer edge. “When people check time, we look at the minute first because we usually have good sense of the hour,” he reasons. “So, when people touch--or see--the minute hand, they know where it is immediately. Then, if you still want to check the hour, you can turn to the hour ball bearing.”