A quartz-type wristwatch is a wristwatch with a mechanism that utilizes the property of a crystal oscillator to which voltage is applied to vibrate regularly, powered by a battery.
It is a wristwatch with a mechanism that automatically winds up the mainspring by rotating the rotor built into the power source movement according to the movement of the arm wearing the watch.
A radio solar watch is a watch equipped with a solar power generation function and a function that automatically corrects the time by receiving standard radio waves operated by the Communication Research Laboratory.
