If your clock is made after 1955 there is a good chance to be able to get a new cuckoo clock movement to replace the old cuckoo clock movement. To get a new cuckoo clock movement you would need the markings off of the cuckoo clock movement itself, not off of the paper work, not off of the case. These markings are stamped on the back of the cuckoo clock movement only right off of the brass back plate. Regula is the most common unit made and easy to identify as it would have a 24 and some other information if it's a one day cuckoo clock movement, or it will say 34 and some other things if it's an 8 day cuckoo clock movement.
Most popular one day weight driven cuckoo clock movement. Comes with chains, hooks and rings. This movement uses two weights at 5/8 LBS (275 Grams) each (not included). The pendulum is the Smaller one day size.
The drop is the measurement from the suspension post (top of the movement) down to the center of the pendulum leaf where the clock keeps approximate time.
Item # R25
Most popular 8 day weight driven cuckoo clock movement. Comes with chains, hooks and rings. This movement uses two weights at 3 1/4 LBS (1500 Grams) each (not included). The pendulum is the Larger 8 day size.
The drop is the measurement from the suspension post down to the center of the pendulum leaf where the clock keeps approximate time.
Item # R34
Cuckoo Clock Movements
1 CM = 10 MM
2.54 CM = 1 inch
25.4 MM = 1 inch
19.5cm = 7 3/4"
23.5cm = 9 1/4"
28.5cm = 10 1/2"
40.05cm = 15 3/4"
Swapping the cuckoo clock movement can be tricky if you have never done one before but these are the basic steps. Take off the hands, unhook the bird off of the door and remove the hooks and rings from the chains, then flip the clock over. Take the back off and undo the bellow wires off of their lifters. This is done by opening the loop that lifts the bellow wires up and down, open the loop with a small flat screwdriver by twisting it so it will open. Next take out the bellows by unscrewing the screw on the outside of the side of the cuckoo clock case. The bellows will now come out and you can take the four screws out that hold the cuckoo clock movement in. When you receive your new cuckoo clock movement the arm that the bird sits on will have to be bent and cut to size then you can take the bird off of the old cuckoo clock movement by loosening the birds set screw and put it on the new unit. Installation is then the reverse of removal.