I have been working on clocks for about nine years. This is the first double door cuckoo clock that I have worked on. It is a double door cuckoo clock with a Bachmaier & Klemmer movement. The gear behind the minute hand has 4 pins on the back. There is a lever that rides these pins and when it falls of the pin the bird starts cuckooing and won't stop until the lever is raised again and the door stays open. How often is the bird suppose to come out that is started by the pins? Is there suppose to be something else that stops the bird once it starts? I am talking about the bird that is control by the pins. The on the hour bird is control by a count wheel on the back of the movement. How is the bird suppose to work?