Music cuco clock mechanism
SJX company
When the swing is raised and released, it will move freely back and forth due to the force of gravity on it.
The swing continues moving back and forth without any extra outside help until friction (between the air and the swing and between the chains and the attachment points) slows it down and eventually stops it.
Pendulum drive is a lot of sell with little profit. usually buy from clock factory
this kind cuckoo part also buy from wood shop .some DIY shop .
There are many colors of door you can choose.