Design submitted by Sam from Germany.
Sam thought about how to make the center of the watch hollow, but without showing skin of the person who wears the watch, and he came up with this watch design.
Sam used two mirrors to let the LED ring reflect again and again, and therefore create a deep tunnel. This optical effect creates a hole, but it is only virtual.
There is a ring of 60 LEDs. Green LD shows the hour position, just like the hour hand of an analog watch. Blue LED shows the minuted position. The space between these LEDs is filled up with a gradient from green to blue. The rest of the ring is lit up in white. There are no numbers to make it simple and intuitive.