This clock is mechanical & will need winding every day its used. It was manufactured in West Germany in early 70s. The movement is by "Regula" the ever-popular German make.
This is a medium-size case, see the photo measurement. As classic clocks are mostly mechanical & are usually over 50 years old, one cannot expect precision quartz timing, within 10 minutes a day is deemed accept by the USA Watch & Clock Institute. Tested over 24 hours this clock was within (2) minutes. The Cuckoo sounds once on the half hour with the gong & fully on the hour with the gong, cuckoo & music. Translation on music box: "Open your window with me" interesting.