New Radian watch giveaway

"The Radian Watch combines the unit circle with the 12 hour dial. I hope you already know how to tell time, so we stuck 0 at the 3 o'clock position like it belongs and the radians count up counter clockwise. I called out the angle measurements at each of the hour positions and stuck the eighths in there too.
In the background is the subtle Archimedean spiral, because it's looks cool and graphs the equation r = a + bθ."
                      —  Christopher Thompson