Why 32,768 Hz?
32,768 Hz is related to how a quartz watch movement works!
In 1880, scientists discovered that quartz crystals vibrate when exposed to an electrical current. When cut into a specific shape and exposed to an electric current, the quartz crystal will vibrate at an exact frequency.
Most quartz watches are designed to consistently vibrate at a frequency of 32,768 times per second.
The electronic circuit within the movement will count the number of vibrations per second, and send an electrical impulse to the motor every 32,768 vibrations, which moves the second hand forward by one second - creating an extremely accurate movement.