Trigger
This “trigger” movement is designed to omit an electronic pulse on the hour to trigger a sound making device. These movements are commonly used in novelty clocks that have the sound of a bird, train of other sound ringing on the hour. The threaded part of the hand shaft is 9/16″ long and designed to be used with clocks that have a dial thickness of 1/2″ or less. The overall shaft length is 7/8″.
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