Hottptyer Mechanical watch main spring Replacement Part copper Supports stable movement performance using a during repair resists oxidation and rust

[STABLE MOVEMENT PERFORMANCE] This copper main spring is mainly used to support the normal working and stable performance of a mechanical watch movement. It provides a practical replacement part for watch repair tasks when the original spring is old or broken. [COPPER CONSTRUCTION] Made from copper the spring is not easy to deform and can effectively resist oxidation and rust. This material supports a long service life while helping maintain a useful component for repeated watch repairing work. [REPLACEMENT PART] Designed as a replacement for an old or broken watch main spring this accessory helps repairmen restore movement operation during maintenance. Check the dimensions before use with a diameter of 4.9 cm 1.93 in and height of 2 cm 0.79 in. [WATCH REPAIR USE] This movement main spring is suitable for watch makers watch repairing workers repairmen and amateurs. It offers a practical component for maintenance projects and can help users save expensive repair costs through hands on servicing. [PRACTICAL ACCESSORY] As one of the professional watch repairing tools this copper component is practical for maintenance and replacement work. Use it to address an old or broken spring while supporting normal movement operation in a compact form.