Before I get your hopes up this watch no longer exists and it was a failure so it probably won't come back.
The bumps raise and lower, allowing you to tell time through touch. In a meeting or conversation you'll know the time without appearing rude.
Here's how it worked:
http://www.worldtempus.com/wt/1/232/
It was either called the "Secret Eye" watch or the "See Touch Watch" depending on the translation.
Ok, beat that!