How do you regulate the time on antique waterbury clock?

To regulate the time on an antique Waterbury clock, locate the pendulum and the regulating mechanism, usually found on the pendulum bob or near the clock's movement. Adjust the pendulum by moving the adjusting nut or screw up to speed up the clock or down to slow it down. Make small adjustments and allow the clock to run for 24 hours before making further changes to ensure accuracy. Finally, ensure the clock is level and not affected by external vibrations, as these can impact timekeeping.