Named for its bright green SuperLuminova numerals and indications, the Urwerk Ur-105 Kryptonite Watch is all about contrast. Its 39.5mm octagonal case is crafted from matte black AlTiN-coated titanium, creating a dramatic look, and has a catch on the top you need to slide to reveal the wandering hour mechanism. Twin pneumatic turbines on the back regulate the self-winding rate, allowing you to harness slight movements, only more vigorous motion, or turn it completely off for manual winding.