The latest version of Urwerk's UR-100V, still carrying the brand's signature satellite hour complication, is executed in a rich shade of purple providing immediate visual impact against the shot-blasted titanium case and white rubber strap. Chief designer Martin Frei chose the color due to it having the highest frequency on the visual spectrum, saying, “I like the fact that a color is much more than what we can perceive. The color spectrum visible to our eyes ranges from red to violet. Beyond that shade, the color turns into a waveform that our eyes can no longer detect, ultraviolet." The UltraViolet fits effortlessly into the UR-100 collection and is limited to 25 pieces.