Auto-Set High-Torque battery clock movements have now changed the way we adjust clocks for Daylight Saving Time(DST). For the past decade or so a radio controlled movement, or Atomic clock movements, were the only way to do this. The battery clock movement would receive a radio signal, and either stop or fast forward an hour to adjust for Daylight Saving Time.
In theory this was a great idea, because the time broadcast on radio station WWVB is based on the Caesium -131 Atomic Clocks in Fort Collins, Colorado. It’s very accurate and it’s broadcast on a low frequency AM radio wave. Unfortunately, there are a variety of AM broadcast issues which can potentially cause interference with the reception of the atomic clock signal being broadcast.