"QUARTZ" on clock faces?
Answers:
A quartz clock is a timepiece that uses an electronic oscillator which is made up by a quartz crystal to keep precise time. This crystal oscillator creates a signal with very precise frequency. Usually some form of digital logic counts the cycles of this signal and provides a numeric time display, usually in units of hours, minutes, and seconds.
Other answers:
quartz clock will be relatively accurate as the temperature changes
quartz clock will be relatively accurate as the temperature changes
Quartz brand watches and clocks have quartz crystals inside.