Learn how to repair open coil units of quartz electromechanical watch movements.
The coil unit is the most delicate part in the quartz movement. When we open the back cover either for a service or to change the battery, the coil is exposed in most cases. This coil is usually housed very close to the battery (I still don't understand why all manufacturers have such a bad design, which endangers the coil every time the battery is changed). It is very common to find coils open or with their thread sectioned. It must be taken into account that the thread of which it is composed is finer than a human hair and a slight rubbing with a metallic object such as a screwdriver can section it easily.
The fastest and most economically profitable option is its replacement, but sometimes this is not a viable solution. Either because in the country where we are located it is difficult to import the replacement unit or because it is a vintage watch for which there are no new parts and the donor watches that we can find have the coil unit also sectioned .