Not your typical skeleton watch, HYT is no ordinary timepiece. HYT’s hydromechanical horologists deftly blend mechanics and liquid within a wristwatch, wherein liquid that runs through a capillary powered by bellows indicates the time. On the HYT H4 Nero, the hours are indicated via a traditional hand at 12 o’clock, but to read the minutes, one must push a button and watch the liquid (green in this version) move around the rim of the dial to indicate the time. Additionally, H4 Nero is equipped with a light source under the dome: two purple LEDs that, when activated, flood the dial with fluorescent light. The fully mechanical watch has no batteries or electronics for this flood of light. The watch is open-worked to show the two multi-layer bellows that push the fluid through the capillaries. Just 15 pieces will be made.