Most visitors online was 1660 , on 12 Dec 2020
It strikes one on any hour and none on the half hour. On the half hour the three quarter moon brass piece on the right moves about half around but nothing happens.If Willie's suggestion doesn't work, remove the hands and then the dial so you can see into the front of the movement. That would show you what is (or is not) happening.
When I like that it cuckoosThat black lever that comes down, behind and to the right of the "three quarter moon", use a small screwdriver to lift that up and see what happens. Normally the rack would drop and the strike/cuckoo would run until the rack is gathered up.
Report back on what happens.