Help with the Russian cuckoo clock

[Cihan]

Friends. I bought a watch similar to the one in the photo at the flea market. There is no pendulum. There are no weights. I have to do it myself, but I don't know the original values. Pendulum length is the most important.  If anyone has any information, I would appreciate it.

 

[Kalanag]

Build a makeshift pendulum and find the right length by testing. Then find a nice one with the correct size.

Chose the weights for a decent but not excessive amplitude (movement clean and lubricated).

[oldhippy]

To help you here you have a list of weights for Cuckoo clocks but I don't know if it covers the Russian clocks.

https://www.cousinsuk.com/product/cuckoo-clock-weights-mechanical

[watchweasol]

As @Kalanag explained , make up a temporary system to gauge the performance of the clock.   De Carles book. Practical Clock Repairing has a great deal on pendulum calculations, if you can lay your hands on a copy .