It brings out the cuckoo on the hours and once on the half hour, it plays a lovely melody on the hour and some other waltz on the half hour on I believe a 30 note Reuge movement.. I took photos of the clock mechanical movement which is not a Regala. The clock has a wide sweet spot but should be leveled to its best running position. The cuckoo bellow and whistle are still in great condition so make a clear and loud cuckoo. I will provide more details.