Guarantee card numbers, T3005-3, 21.04.2121. 
It stopped working approx. a year ago, and without daily use till that. It was put aside, now is time to settle things.
 
The moving counterweigh that is seen through tranparent bottom (or the spring) seems to have lost catch or stopper – when I am winding the clock, the counterweigh starts to rotate back, spinning fast, and the watch stops once more. 
Should be repaired or parts replaced.
