Changing the speed of time keeping is accomplished by moving the pendulum disk up or down. This is done by turning the adjustment nut at the bottom of the pendulum.
To slow the clock down, lower the disk by turning the adjustment nut to the left.
To speed the clock up, move the pendulum disk up by turning the adjust nut to the right.
The adjustment nut should be turned one complete revolution for each half minute fast or slow per day (24 hours). Let the clock run 24 hours after each adjustment and make additional adjustments as needed.
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