You'll never forget that time is relative with this mathematically nerdy watch! Instead of the hands moving, the numbers rotate around the face of the watch. Don't forget that π≈3, x≡10, and Λ is surely 11 is some units, and you'll always be on time in some universe.
Watch face is 1.3 inches across featuring Japanese quartz movement in a nickel-free zinc alloy case and leather band, almost 9 inches total length. Not waterproof. Comes with a metal gift/storage box and one Earth-year manufacturer's warranty.