Pieza de servicio de reloj de resorte principal para cuerda manual LONGINES Cal. 10.25 10.86 13ZN, etc.

10.25 10.86 13ZN etc. If your watch does not yet need a service, keep one for future use, as these are getting harder and harder to find. This list contains only manual wind calibers. These mainsprings are produced inSwitzerland byGenerale Ressorts, one of the biggest (if not the biggest) and most reputable mainspring manufacturers in the world.

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