CHUMA winding parameters

Definitions:

  • «CW» - Clockwise winding direction;
  • «CCW» - Counterclockwise winding direction;
  • «Both» - Combined mode (Clockwise + Counterclockwise);
  • «» - Undefined;

MODEL, DESCRIPTIONMOVEMENT / CALIBERWINDING DIRECTIONTURNS PER DAY (TPD)
Linie I - Chronograph StahlValjoux 7750CW800
Linie I - Damenuhr StahlETA 2824-2Both650
Linie I - GMT StahlETA 2892-A2Both650
Linie I - Herrenuhr StahlETA 2824-2Both650
Serie IValjoux 7750CW800
Serie II - D60-1ETA 2824-2Both650
Unikate - Modell Avantgarde GoldValjoux 7750CW800
Unikate - Modell Saphir SafireValjoux 7750CW800

If you could not find your watch model (or caliber) in this table, you may determine your CHUMA winding mode on a trial basis. You should select the combined winding mode (CW+CCW) and the minimal number of turns per day (TPD). Then place your watch into the winder and check after a few days how accurate your watch shows the time. If it runs behind, it is necessary to increase the number of TPD by one step.