The inside looks tidy and clean enough – so hopefully, I will not encounter more problems.
The brass wheels are for the gear train, and metal coloured wheels are for the winding train. There is no centre wheel – only the second arbor runs through the middle of the plate (under the bridge you can see in the middle).
With the bridge removed, you can see the second arbor.
The cannon pinion is driven from the top plate.
Everything taken apart and ready for cleaning.
Cousins UK has a large selection of parts for the calibre 2415 movement, which is great.
With the balance jewels back in, I start putting the gear train in. I ordered a new second hand arbor, as the original one was bent, and it didn’t survive my attempt to straighten it out. At £9, the damage isn’t too bad.
The movement is coming back together.
The balance does not only have outrageous side- and end shake, but the hairspring is deformed, and some of the windings stick together. I tried demagnetizing, but this is permanent damage. As the whole balance assembly only costs £9, this is a quick decision! Not like £200 – £300 for an Omega or Rolex balance 😉
After three attempts, I have a decent beat error of 0.5ms. Good amplitude of 287 degrees, with slightly shaky lines – but this is not a brand new watch.
Now I can put the bottom plate back together.
Dial and hands go back on.
The movement goes back into the case, and the rotor for the auto winder goes on. The little lock for the rotor isn’t on yet, you can see the space in the middle of the rotor where it goes.
With a new gasket, the back is put back on, and here we have a pretty stylish Russian watch!