This clock is mechanical & will need winding every day its used. It was manufactured in West Germany in 1978. The movement is by "Regula" from Germany. (our workshop has a range of Regula parts).
This is a nice larger case, see the photo measurement, 440mm x 280mm. This clock came from Washington State in the USA, when we received it, the clock was so clean & dry we decided to leave the case as is & only service the movement, lovely lazy action from the bird. As classic clocks are mostly mechanical & are usually up to & 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. This Cuckoo sounds once on the half hour with the gong, & fully on the hour with the gong & cuckoo.
As this is a large case the cuckoo & gong are very mellow.