Youngtown put the number 12888 on just about every quartz movement they make so check the description carefully. This trigger movement is designed to emit 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, or other sounds on the hour. Threaded part of hand shaft is 3/16" long, 5/16" diameter, to go through up to 1/8" thick clock face. Shaft diameters: the hour hand mount is .20" (5.09mm), the minute hand mount is .125" (3.2mm). The total shaft length is 1/2". Case Size: 2-1/8"W x 2-1/8"H x 9/16"D.
Face and dial thickness is how thick the material is that the hand shaft goes through.
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