When it comes to watches, we’re used to the concept of an automatic movement, once that keeps itself running just by virtue of being on our wrists as we go about our day. Clocks, on the other hand, don’t enjoy that same luxury. As they’re not really being moved around, they’re dependent on electricity, manual winding, or resetting of weights that provide kinetic energy to the movement. As we’ve written before, there is one line of clocks that works without any visible external inputs.