Mr. Jone's Watch Project.

It makes other watches seem so boring.
For instance, the Tilt watch:

[...] enables the wearer to check the time without looking at their watch or displaying it to others. It is a watch equivalent of Braille – a watch which can be read unsighted. It consists of two opposing faces on the front and back of the wrist. The wearer rotates their arm and as the watch passes through the corresponding angle of the hours and minutes, a pulse is transmitted onto the wrist allowing the wearer to ‘feel’ the time. This discreet action allows one to check the time without appearing either bored or impatient.

Mr Jones Watches :: Tilt