- 1). Locate the small hole above the “12.” This is called the key arbor.
- 2). Insert the smaller end of the clock's key into the key arbor.
- 3). Turn the key to the right to speed up the running time, or to the left to slow down the clock. According to the National Association of Clock and Watch Collectors, turning the key one full revolution will change the running time by five minutes.
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