Vostok Komandirskie (cal. 2414A) after service is measured on the timegrapher 

Carefully selected parts from multiple movements were mounted, pivots (including the balance) were polished. Proper synthetic oils were applied.
The timegrapher is the Watch-O-Scope free software with my DIY microphone and with PEACE amplifier.
The balance amplitude is around 280 degrees which is great, the beat error and rate was adjusted.
That beckground noise is from the computer fan or from the mains, the microphone cable is not shielded.