Rau-Tech is a German company that exists in the boutique world of high-end Rolex replica watches customization. This microcosm of horology is mostly proliferated by custom Rolex watches, which are becoming quite popular. One of the most common questions I have been getting from people all over the world is, “when will Rolex start to offer black colored watches?” They seem to feel that with all the custom Rolex watches out there with black cases, there seems to be a…