Not a lot of people associate concrete as a base structure for a mechanical tool apart from buildings. Nevertheless, people have been using concrete to make boats, even submarines!
This fact must have been by Dzmitry Samal decided to use this material for his Concrete Watch design. A real out-of-the-box thinking to choose concrete over other more exotic elements for a wristwatch.
With a diameter of 52mm excluding the crowns, this is a large watch.
The beauty of this material is its ability to be molded into any shape one desires.