The Diamond Nodding CAT is a classic mechanical wind up clock. The clockwork mechanism runs for about 28 hours before it needs to be rewound. Like all old-style wind up clocks, this clock tick tocks audibly and the alarm is jangly and loud. The body is all metal with glass front. The EYES of the CAT tilts to and fro once every second. The rear of the clock has two windup keys, one for the clock itself and a second one for the alarm. The two knurled knobs either set time or the alarm. A plastic push/pull button turns on or shuts off the alarm. A tab recessed in a half circular slot allows adjustment of the speed of the clock for accuracy. This clock is working condition. Clock weighs 9 ounces. 4.75? tall, 4.5? wide and 2? deep. Made by Diamond Clock Factory in Shanghai China probably around the 1960s