Watch Uses Pistons, Bellows and Liquid to Tell the Time

This is the HYT H1, and it uses a liquid-filled chamber to display the hours using a luminescent green fluid. In fact, that green stuff is fluorescein, which has applications in forensics to detect latent blood stains. But hey, you can use it to tell the time, too.

 http://www.youtube.com/watch?feature=player_embedded&v=6zn1fTtbp84#!